ZIP 78664 broadband research · Round Rock, Texas Availability varies by exact service address
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Round Rock ZIP 78664

78664 Internet Providers

Broadband in 78664 is unusually competitive for a Round Rock ZIP because AT&T Fiber and Google Fiber overlap with a very large Spectrum cable footprint, while T-Mobile and Verizon provide extensive fixed-wireless alternatives. Smaller networks including Optimum, Astound Broadband and Hotwire also appear in current ZIP-level records.

● ZIP-level research identifies the local provider market. It does not establish that every home, apartment or subdivision can order every provider listed on this page.

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ZIP-code results describe the local service market. Provider eligibility, available technology, speeds and pricing can differ at individual addresses, apartment buildings and subdivisions.
Location
Round Rock, Texas · 78664
Main technologies
Fiber · Cable · 5G · Satellite
Local evidence
Provider + FCC-derived ZIP records
Research standard
Address verification required

What the 78664 broadband evidence shows

ZIP 78664 has a materially different broadband profile from a typical single-provider suburban market. Current ZIP-level records show multiple large fiber networks alongside extensive Spectrum cable and broad fixed-wireless coverage. The result is a market where the most important question is often which networks reach a particular property, not simply which companies serve Round Rock.

Fiber competition

AT&T and Google Fiber overlap

Current ZIP-level data estimate AT&T Fiber at about 70% of 78664 locations and Google Fiber at about 67%. These estimates indicate substantial overlap between two major fiber networks, although the percentages are dataset estimates rather than address-level ordering results. AT&T separately identifies Round Rock ZIP 78664 with fiber service up to 5 GIG.

Cable

Spectrum remains a major wired competitor

Spectrum has an estimated 97.55% cable footprint in the ZIP in the current secondary FCC-derived dataset reviewed. Its advertised maximum in that dataset reaches 1 Gbps, but the reported upload ceiling is substantially lower than the download ceiling. That makes fiber versus cable an important distinction for upload-heavy households.

Wireless

5G home internet is not merely a fallback

T-Mobile Home Internet and Verizon fixed wireless both have extensive reported coverage in 78664. The ZIP-level dataset estimates roughly 97% T-Mobile and 93% Verizon fixed-wireless availability. Eligibility and performance can still vary with address, capacity and radio conditions.

78664 provider comparison

The table separates providers with substantial ZIP-level evidence from smaller footprints. Coverage percentages are presented as research estimates rather than guarantees. The FCC's National Broadband Map is location based, and provider address checkers remain the appropriate source for live ordering eligibility.

Provider Technology 78664 evidence Advertised maximum Verify
AT&T Fiber
Major ZIP footprint 		Fiber AT&T's own service-area information identifies Round Rock ZIP 78664 with fiber up to 5 GIG. Current ZIP-level data estimate a roughly 70% fiber footprint. Up to 5 Gbps where available
Check AT&T
Google Fiber
Major ZIP footprint 		Fiber Current ZIP-level records estimate Google Fiber availability at about 67% of 78664. Round Rock began the Google Fiber buildout in southeast Round Rock in 2023, with construction continuing as portions of the network became serviceable. Up to 8 Gbps where available
Check Google Fiber
Spectrum
Very large ZIP footprint 		Cable Current ZIP-level data estimate Spectrum cable coverage at roughly 98% of 78664. This is one of the broadest wired footprints in the ZIP, but cable availability does not mean every address has the same upload capability or plan options. Up to 1 Gbps in current ZIP data
Check Spectrum
T-Mobile Home Internet
Extensive fixed wireless 		5G fixed wireless Current ZIP-level records estimate T-Mobile Home Internet coverage at more than 97% of 78664. The dataset reports different maximum speeds within the ZIP, demonstrating why a broad coverage figure should not be interpreted as a uniform plan or performance result. Plan and location dependent
Check T-Mobile
Verizon 5G Home Internet
Extensive fixed wireless 		Fixed wireless Current ZIP-level records estimate Verizon fixed-wireless coverage at roughly 93% of 78664. Verizon also has multiple retail locations in Round Rock, but retail presence is not treated as proof of residential service at a particular address. Plan and location dependent
Check Verizon
Optimum
Limited cable footprint 		Cable Current ZIP-level data identify Optimum in a small portion of 78664, estimated at about 8%. The dataset places the footprint in multiple portions of the ZIP rather than treating Optimum as a ZIP-wide provider. Up to 940 Mbps in current ZIP data
Check Optimum
Astound Broadband
Limited local footprint 		Cable and fiber Current ZIP-level data identify both Astound cable and fiber footprints. The cable estimate is about 6%, while the fiber estimate is about 4%. This is a meaningful local option for certain properties but not a ZIP-wide network. Up to 1.5 Gbps in current ZIP data
Check Astound
Hotwire Communications
Limited fiber footprint 		Fiber Current ZIP-level data estimate a Hotwire fiber footprint of about 3.5% in 78664 and identify it primarily in the northwest portion of the ZIP. This type of small footprint is especially relevant to specific developments or buildings. Up to 5 Gbps in current ZIP data Verify building and address eligibility
Rise Broadband
Fixed wireless 		Fixed wireless Current ZIP-level records identify Rise Broadband across a substantial portion of 78664. It is a secondary option compared with the large wired networks, but can be relevant where a property does not have the desired fiber or cable combination. Up to 100 Mbps in current ZIP data Verify exact wireless eligibility
Other fixed wireless / satellite
Property dependent 		Fixed wireless / satellite ZIP-level records also identify smaller fixed-wireless networks such as SOS Communications and VTX1, along with satellite options. These networks should be treated as property-specific alternatives, not interchangeable with the major wired networks. Provider and plan dependent Check current address eligibility
ZIP-level interpretation: 78664 has an unusually deep broadband market. The strongest evidence is the combination of two large fiber networks, a very broad Spectrum cable network and extensive fixed wireless. Smaller footprints create additional choices at some properties, but they should not be generalized across the entire ZIP.

Internet providers serving the 78664 market

The provider descriptions below focus on networks with current ZIP-specific evidence. The page separates large footprints from smaller or more specialized networks so that the provider list does not imply uniform availability across Round Rock.

AT&T Fiber

Fiber Round Rock / 78664 Up to 5 Gbps

AT&T has direct provider-specific evidence for 78664. Its current Round Rock service information identifies ZIP 78664 among the Round Rock ZIP codes associated with fiber service up to 5 GIG. A current ZIP-level dataset estimates that roughly 70% of locations in 78664 have AT&T fiber.

  • AT&T identifies 78664 directly rather than relying only on a citywide Round Rock claim.
  • The ZIP-level data show both fiber and older AT&T access technologies, so the provider name alone does not establish fiber service.
  • Current ZIP-level records show fiber upload speeds matching download speeds where the 1–5 Gbps fiber tiers are available.
  • The exact address determines the available fiber tier.
Local evidence: AT&T's current area information lists Round Rock ZIP codes 78664, 78665 and 78681 with fiber service up to 5 GIG. A separate current ZIP-level dataset estimates about 70.26% AT&T fiber availability in 78664.

Google Fiber

Fiber Major 78664 footprint Up to 8 Gbps

Google Fiber is a major reason 78664 should not be described simply as a cable market. The City of Round Rock approved the network's right-of-way agreement in 2022, construction began in southeast Round Rock in 2023, and city updates documented continued microtrenching and service expansion through 2024 and into 2025. Current ZIP-level data estimate Google Fiber availability at roughly 67% of 78664.

  • Google Fiber's Round Rock buildout began in southeast Round Rock.
  • Construction used microtrenching along portions of neighborhood streets and rights of way.
  • Current ZIP-level data report fiber service in a large share of 78664.
  • Google Fiber now advertises multi-gigabit service, with current product information reaching up to 8 Gbps where available.
Local evidence: Round Rock city records document the Google Fiber construction program, including more than 300,000 linear feet of microtrenching completed by July 2024 and continued construction through the remainder of 2024 and into 2025. Current ZIP-level data estimate about 67% Google Fiber availability in 78664.

Spectrum

Cable Very large ZIP footprint Up to 1 Gbps in ZIP data

Spectrum remains one of the most geographically consistent wired options in 78664. Current ZIP-level records estimate cable coverage at about 97.55%. That makes Spectrum materially different from the smaller Optimum and Astound footprints. The tradeoff is that the reported upload ceiling is much lower than the download ceiling.

  • Current ZIP-level data estimate roughly 98% Spectrum cable availability.
  • The dataset reports download capacity up to 1 Gbps throughout its modeled ZIP footprint.
  • The same dataset reports upload capacity up to 35 Mbps.
  • Fiber alternatives from AT&T and Google Fiber make upload performance particularly relevant when comparing plans.
Local evidence: The current ZIP-specific dataset reviewed estimates Spectrum cable availability at 97.55% of 78664 and reports a maximum download speed of 1,000 Mbps with a maximum upload speed of 35 Mbps.

T-Mobile Home Internet

5G fixed wireless Extensive ZIP footprint Capacity-dependent

T-Mobile Home Internet is a significant part of the 78664 broadband market rather than a marginal fallback. Current ZIP-level data estimate coverage at more than 97% of the ZIP. At the same time, the dataset shows different maximum speeds and upload capabilities within 78664, illustrating why a large coverage percentage does not mean every address receives the same wireless service.

  • The connection uses T-Mobile's wireless network rather than a dedicated fiber or cable line.
  • Current ZIP-level records report both higher- and lower-speed portions of the ZIP.
  • Network capacity can affect residential eligibility.
  • Wireless service should be checked separately from mobile phone coverage.
Local evidence: The current 78664 dataset estimates T-Mobile Home Internet fixed-wireless availability at about 97.43% of the ZIP. The same dataset reports different maximum speeds in different portions of 78664, so the percentage should not be interpreted as uniform service quality.

Verizon 5G Home Internet

Fixed wireless Extensive ZIP footprint Address dependent

Verizon is another major fixed-wireless option in 78664. Current ZIP-level data estimate Verizon fixed-wireless availability at roughly 93% of the ZIP, with the dataset reporting plans up to 300 Mbps. Verizon also maintains multiple locations in Round Rock, although a retail location is not treated as evidence that every nearby residence can order home internet.

  • Verizon's fixed-wireless footprint is extensive in the ZIP-level data.
  • The service is materially different from Verizon's fiber network in other markets.
  • Wireless signal and capacity can affect the service offered at a property.
  • Verizon's live home-internet availability tool should be used for the final determination.
Local evidence: Current ZIP-level records estimate Verizon fixed-wireless coverage at 92.87% of 78664 and report maximum download speeds up to 300 Mbps. Verizon also lists Round Rock retail locations at 78664 addresses.

Optimum

Cable Small ZIP footprint Verify address

Optimum is a smaller wired competitor in 78664. Current ZIP-level records estimate its cable footprint at about 7.7%, substantially below Spectrum's coverage. The data identify Optimum in multiple portions of the ZIP, so it is more useful as a property-specific option than as a default Round Rock provider.

  • Optimum has a limited footprint compared with Spectrum.
  • The current ZIP dataset reports cable service up to 940 Mbps.
  • Reported upload capacity is materially below fiber-level symmetric service.
  • An exact-address check is necessary before including Optimum in a household comparison.
Local evidence: The current ZIP-specific dataset estimates Optimum cable coverage at 7.68% of 78664 and places the footprint across several portions of the ZIP rather than throughout the market.

Astound Broadband

Cable Fiber Small local footprint

Astound Broadband has a smaller but technically interesting presence in 78664 because current ZIP-level data identify both cable and fiber service. The cable estimate is about 6%, while the fiber estimate is about 4%. That makes Astound relevant to certain properties without making it reasonable to describe the provider as ZIP-wide.

  • Current data identify both Astound cable and fiber in 78664.
  • The reported cable footprint is larger than the reported fiber footprint.
  • The current ZIP dataset reports up to 1.5 Gbps for both technology categories.
  • Fiber availability should be treated as a specific local footprint rather than a general Round Rock characteristic.
Local evidence: Current ZIP-level records estimate Astound cable availability at 6.14% and Astound fiber availability at 3.98% in 78664. The reported fiber footprint is therefore significant enough to mention but too limited to generalize across the ZIP.

Hotwire Communications

Fiber Small footprint Building dependent

Hotwire Communications appears in current 78664 ZIP-level broadband records with a small fiber footprint. The dataset estimates coverage at about 3.5% and places the reported footprint primarily in the northwest portion of the ZIP. Small fiber networks of this type can be especially relevant to individual developments or buildings.

  • Hotwire is not treated as a ZIP-wide Round Rock provider.
  • The current dataset identifies fiber service in a limited portion of 78664.
  • Building-level infrastructure can matter more than the ZIP boundary.
  • Properties with an unusual provider mix should be checked directly with Hotwire.
Local evidence: The current ZIP-specific dataset estimates Hotwire fiber coverage at approximately 3.49% of 78664 and identifies the reported footprint primarily in the northwest part of the ZIP.

Rise Broadband and smaller fixed wireless

Fixed wireless Secondary options Location dependent

Fixed wireless in 78664 extends beyond the two major national 5G home internet brands. Current ZIP-level records identify Rise Broadband across a substantial portion of the ZIP and also show smaller providers such as SOS Communications and VTX1. These networks can matter at properties where the preferred wired options are unavailable or where a resident is comparing multiple wireless alternatives.

  • Rise Broadband is reported across a substantial portion of 78664.
  • SOS Communications has a broader secondary fixed-wireless footprint in the dataset.
  • VTX1 has a smaller reported footprint concentrated toward parts of the ZIP.
  • Wireless provider names should not be treated as interchangeable because network technology and capacity differ.
Local evidence: Current ZIP-level records estimate Rise Broadband at about 52% of 78664, SOS Communications at about 62% and VTX1 at about 10%. These figures come from a secondary FCC-derived dataset and are presented as mapping estimates, not live service guarantees.

Satellite providers

Satellite Broad geographic option Different network model

Satellite remains a geographically broad alternative in 78664, although the ZIP's extensive fiber, cable and fixed-wireless choices make it a different proposition from the primary wired market. Satellite can become more relevant where a property has unusual service limitations or where terrestrial infrastructure is not available at the desired address.

  • Satellite does not depend on the same local cable or fiber plant.
  • Latency and equipment requirements differ from terrestrial broadband.
  • Plan performance depends on the specific satellite network and service conditions.
  • It should be compared only after confirming the wired and fixed-wireless options at the property.
Evidence standard: Satellite is included as a geographic alternative rather than as evidence that a particular satellite provider is the preferred option for a 78664 household.

78664 internet speed guide

The ZIP's advertised speed range is unusually wide because it contains multiple fiber networks, a very broad cable network and extensive fixed-wireless service. The technology reaching the address is therefore more informative than a single ZIP-wide maximum.

100–300

Mbps

Useful for ordinary browsing, video calls, streaming and moderate household use when the connection is stable.

500 Mbps

Mbps

A practical range for households with several simultaneous users, multiple streaming devices and larger downloads.

1–2 Gbps

High-capacity plans

Relevant to larger households and high-volume use where the property has a qualifying fiber or high-capacity cable network.

5–8 Gbps

Multi-gig fiber

AT&T advertises up to 5 Gbps and current Google Fiber products reach up to 8 Gbps where available. These are property-specific tiers, not ZIP-wide guarantees.

78664 has an important upload-speed distinction. Current ZIP-level data report Spectrum cable with download capacity up to 1 Gbps but upload capacity up to 35 Mbps, while AT&T and Google Fiber report symmetric fiber capabilities on their qualifying networks. For remote work, cloud backups, large file transfers and other upload-heavy uses, the connection type can matter more than the advertised download number.

Connection types in 78664

The local network mix is defined by overlapping fiber and cable systems, extensive fixed wireless and smaller provider footprints. This creates more meaningful technology differences between properties than the ZIP name alone suggests.

Fiber

AT&T and Google Fiber are the two most significant fiber networks reported in current 78664 data. Smaller fiber footprints are also reported for Astound Broadband and Hotwire Communications. Fiber availability is therefore common in the ZIP but not universal at every address.

Cable

Spectrum has a very large cable footprint in 78664. Smaller cable footprints are reported for Optimum and Astound Broadband. Cable can provide high download capacity, but upload performance can differ substantially from the fiber networks in the same ZIP.

5G / fixed wireless

T-Mobile and Verizon both have extensive fixed-wireless coverage in current ZIP-level records. Additional wireless providers such as Rise, SOS Communications and VTX1 create more choices at some locations.

Satellite

Satellite remains geographically available independently of local fiber and cable construction. It is technically different from terrestrial broadband because latency, equipment and service conditions can affect the experience.

What is different about broadband in 78664?

ZIP 78664 covers a broad part of Round Rock and includes established subdivisions, major employment and recreation corridors, multifamily properties and newer residential development. Those physical and development patterns help explain why broadband infrastructure can vary between properties even inside a highly competitive ZIP.

1

78664 is a two-major-fiber market

Current ZIP-level data estimate AT&T Fiber at about 70% and Google Fiber at about 67% of 78664. Those figures indicate substantial overlapping fiber availability rather than a single fiber network serving the ZIP. The overlap is especially important because the networks were deployed through different construction programs and may not reach the same streets or properties.

2

Google Fiber is a relatively recent infrastructure change

Round Rock approved Google Fiber's right-of-way agreement in 2022. Construction began in southeast Round Rock in September 2023, and a July 2024 city update reported more than 300,000 linear feet of microtrenching completed, with additional construction planned through 2024 and 2025. This matters because the Google Fiber footprint in 78664 reflects a network that was still being deployed after many established neighborhoods already had cable and legacy telecom infrastructure.

3

Spectrum has the broadest major wired footprint

Current ZIP-level data estimate Spectrum cable coverage at about 97.55%, making it the most geographically consistent large wired provider in the dataset. This means many properties can compare Spectrum against one or more fiber providers, but the comparison changes where a property sits outside an overlapping fiber footprint.

4

Fixed wireless covers much of the same ZIP

T-Mobile and Verizon fixed wireless are reported across most of 78664, while Rise Broadband and other smaller wireless providers create additional coverage. This gives some households a third technology category beyond fiber and cable. It also means wireless eligibility should be checked independently instead of assuming that the only choices are the wired networks visible at nearby homes.

5

Established subdivisions and newer construction coexist

78664 contains mature neighborhoods such as Forest Creek, South Creek, Chandler Creek and older portions of the Gattis School Road area, alongside newer development and townhome or multifamily properties. The age and type of construction can affect whether a provider's outside network reaches the property and what internal wiring is already available.

6

Forest Creek illustrates the mature-neighborhood side of the ZIP

Forest Creek is an established southeast Round Rock community developed across multiple phases beginning in the 1990s. Its mature residential infrastructure differs from newer subdivisions being added elsewhere in the broader Round Rock market. A ZIP-level provider list therefore cannot assume that a network recently built in one part of 78664 is immediately available throughout every older subdivision.

7

Old Settlers Park and the Dell corridor are useful geographic reference points

78664 includes the Old Settlers Park and Dell Diamond area as well as portions of the broader Dell employment corridor. These major facilities are useful reference points for understanding the ZIP's geography, but they do not establish residential broadband availability. Residential streets, apartment buildings and commercial properties can have different service inventories.

8

ZIP-level coverage estimates should not be treated as household counts

Current secondary datasets produce different results depending on methodology and data vintage. The useful conclusion is that 78664 has substantial fiber, cable and wireless competition, not that a specific percentage of every residential street can order a particular plan. The FCC's location-level map and provider address checkers are more appropriate for final service verification.

78664 local broadband findings

These findings describe what the ZIP-specific evidence means for a resident or property owner rather than simply repeating provider names.

Finding Evidence What it means for a 78664 address
AT&T Fiber AT&T identifies Round Rock ZIP 78664 with fiber up to 5 GIG; secondary ZIP data estimate about 70% fiber availability AT&T should be checked as a major fiber provider rather than treated only as a legacy DSL network.
Google Fiber Round Rock documented construction beginning in southeast Round Rock; current ZIP data estimate about 67% availability Google Fiber is a major local network, but the buildout does not imply uniform service on every street.
Spectrum cable Current ZIP-level records estimate about 97.55% cable availability Spectrum is the broadest major wired footprint in the dataset and is a key baseline for property comparisons.
T-Mobile Home Internet Current ZIP-level records estimate about 97.43% fixed-wireless availability 5G home internet is a significant local option, but eligibility and performance can vary by address.
Verizon fixed wireless Current ZIP-level records estimate about 92.87% fixed-wireless availability Verizon should be checked independently rather than treating all 5G home internet networks as equivalent.
Optimum Current ZIP-level records estimate about 7.68% cable availability Some properties have a cable alternative beyond Spectrum, but Optimum should not be described as ZIP-wide.
Astound Broadband Current ZIP data estimate about 6.14% cable and 3.98% fiber availability Astound can materially change the provider comparison for properties inside its local footprint.
Hotwire Communications Current ZIP data estimate about 3.49% fiber availability, concentrated in part of the ZIP Small fiber footprints can be especially relevant to specific developments or buildings.
Wireless competition Rise, SOS Communications and VTX1 also appear in current ZIP-level fixed-wireless records Some properties have more wireless choices than the major national 5G brands alone suggest.
Housing differences 78664 contains mature subdivisions, newer development, townhomes and multifamily properties Building infrastructure and construction timing can affect the actual provider list at a property.

Areas and development patterns inside 78664

These locations help explain the geography and development history of the ZIP. They are reference points, not substitutes for an address-level broadband check.

Forest Creek An established southeast Round Rock golf-course community spanning portions of ZIP 78664. Multiple development phases mean neighborhood infrastructure dates vary, making property-level service verification useful when comparing newer fiber networks with established cable.
Chandler Creek A substantial established residential area in 78664. Its mature neighborhood infrastructure is part of the older residential fabric against which newer fiber construction is being layered.
South Creek An established residential area within the 78664 market. Properties here should be checked individually because provider footprints can follow street and development boundaries rather than ZIP boundaries.
Gattis School Road corridor A major residential and commercial corridor through southeast Round Rock. The surrounding development includes established subdivisions alongside newer construction, creating different infrastructure ages within the same ZIP.
Old Settlers Park / Dell Diamond area A major Round Rock recreation and sports district associated with 78664. The area provides an important geographic reference point, but commercial, residential and multifamily properties can have different broadband inventories.
Eastern and southeastern 78664 Parts of the ZIP have experienced continued residential growth while older neighborhoods remain nearby. This mix is relevant to fiber deployment because newly constructed streets and established streets can receive network infrastructure at different times.
Google Fiber buildout context: Round Rock began Google Fiber construction in southeast Round Rock in 2023. The city reported more than 300,000 linear feet of microtrenching by July 2024 and said construction would continue as additional portions of the network became available. A recently constructed fiber network therefore cannot be assumed to have identical availability across every established subdivision in 78664.

Nearby Round Rock-area ZIP-code broadband guides

Adjacent Round Rock ZIP codes can have different network footprints. Use each ZIP as a separate research area rather than transferring 78664 availability assumptions across ZIP boundaries.

78665 Round Rock / northeast broadband guide 78681 Round Rock / northwest broadband guide 78682 Round Rock / east-side broadband guide 78660 Pflugerville / northeast Austin-area guide

How to verify internet service at a 78664 address

The correct sequence is to use ZIP-level research to identify the relevant network choices, then verify the exact property with each provider before comparing plans.

1. Check the major fiber networks

  • Check AT&T for fiber availability and the available speed tier.
  • Check Google Fiber separately because its network was deployed through a separate Round Rock construction program.
  • Check Astound and Hotwire where the property may fall inside their smaller fiber footprints.
  • Do not infer Google Fiber or AT&T availability from a nearby property.

2. Check cable alternatives

  • Check Spectrum as the broadest major cable network in 78664.
  • Check Optimum where its smaller local footprint may reach the address.
  • Check Astound Broadband where its cable network is reported.
  • Compare upload capacity as well as advertised download speed.

3. Compare fixed wireless separately

  • Check T-Mobile Home Internet at the exact address.
  • Check Verizon 5G Home Internet separately.
  • Check Rise Broadband and other local wireless networks if relevant.
  • Do not infer residential eligibility from general mobile coverage.

4. Check the property type

  • Identify whether the property is a single-family home, townhome, apartment or condominium.
  • For multifamily buildings, confirm which providers actually wire the building.
  • Check whether the unit has existing coaxial or fiber infrastructure.
  • Do not assume a neighboring single-family address has the same choices.

5. Use ZIP-level data as a research layer

Current ZIP-level broadband datasets are useful for identifying the providers and technologies reported around 78664. They are particularly useful here because the ZIP has overlapping fiber, cable and fixed wireless networks. The FCC's location-level map can then be used to examine reported providers at a specific location. Provider address checkers remain the appropriate source for live ordering eligibility, current plan availability and pricing.

6. Check when the network was built

Network age matters in 78664 because Google Fiber entered Round Rock through a comparatively recent construction program while many subdivisions already had established cable and telecom infrastructure. A property in a neighborhood where fiber construction was recently completed can have a different provider mix from a nearby property where construction has not reached the serviceable location.

What to compare before choosing a 78664 connection

The local network mix makes it useful to compare technology, upload capacity and address-level availability before focusing on the largest advertised download number.

Fiber versus cable

Check upload capacity

Current 78664 data show a clear technical difference between the networks. AT&T and Google Fiber report symmetric multi-gigabit capabilities on their qualifying fiber networks, while Spectrum's ZIP-level cable data report substantially lower upload capacity.

Fiber competition

Check both AT&T and Google Fiber

A household should not assume that the presence of one fiber network means the other is unavailable. Current ZIP-level estimates show substantial footprints for both networks, but their deployment boundaries do not necessarily match at every address.

Wireless competition

Check T-Mobile and Verizon separately

Both have extensive fixed-wireless footprints in the ZIP-level data, but wireless service can vary with capacity, signal conditions and network configuration. A property should be checked independently with each provider.

Check the exact 78664 address

ZIP-level research identifies the local market. Provider address tools determine what can actually be ordered at the property.

Check Availability

Sources and methodology

This page gives greater weight to official provider and City of Round Rock information for network-specific claims and uses current secondary FCC-derived ZIP-level datasets as a coverage research layer.

Official and local sources

  • AT&T's current Round Rock service information identifies ZIP 78664 among the Round Rock ZIP codes associated with fiber service up to 5 GIG.
  • The City of Round Rock's Google Fiber records document the city's 2022 agreement, the beginning of construction in southeast Round Rock in 2023, and continued microtrenching and network expansion through 2024 and 2025.
  • Current Google Fiber product information was used for the advertised maximum speed of up to 8 Gbps where available.
  • Verizon's current Round Rock business-location records confirm active Verizon locations in ZIP 78664. Retail presence is not treated as residential service evidence.

FCC-derived ZIP-level broadband data

  • Current secondary ZIP-level broadband datasets based on FCC Broadband Data Collection information were reviewed specifically for 78664.
  • The reviewed dataset reports approximately 70% AT&T fiber, 67% Google Fiber and 97.55% Spectrum cable availability in the ZIP.
  • The same dataset reports extensive T-Mobile and Verizon fixed-wireless coverage, along with smaller Optimum, Astound and Hotwire footprints.
  • The dataset reports additional fixed-wireless networks including Rise Broadband, SOS Communications and VTX1.
  • Coverage percentages are treated as estimates for research and mapping, not as guarantees that every household in the ZIP can order the corresponding service.
Research limitation: A ZIP code is a geographic mailing boundary, not a broadband service boundary. Provider coverage can differ by street, census block, building, apartment unit and serviceable address. FCC Broadband Data Collection information is provider-reported and is not a substitute for a provider's live ordering system.

78664 internet provider FAQ

Answers are based on the current provider information, Round Rock infrastructure records and ZIP-specific broadband evidence reviewed for this guide.

What internet providers serve ZIP code 78664?
Current ZIP-level evidence identifies AT&T Fiber, Google Fiber, Spectrum, T-Mobile Home Internet and Verizon fixed wireless as major options in 78664. Smaller reported footprints include Optimum, Astound Broadband and Hotwire Communications. Additional fixed-wireless and satellite options can also be relevant to individual properties. The exact provider list should be confirmed using address-level tools.
Is AT&T Fiber available in 78664?
Yes, AT&T's current service-area information specifically identifies Round Rock ZIP 78664 with fiber service up to 5 GIG. Current ZIP-level broadband data also estimate a substantial AT&T fiber footprint in 78664. This does not mean every address has fiber, so the AT&T address checker should be used for exact eligibility.
Is Google Fiber available in 78664?
Current ZIP-level broadband data report Google Fiber in a substantial portion of 78664, with an estimate of about 67%. The City of Round Rock documented Google Fiber construction beginning in southeast Round Rock in 2023, followed by continued network construction through 2024 and 2025. Availability should still be confirmed at the exact address.
Does Spectrum serve 78664?
Yes. Current ZIP-level broadband data estimate Spectrum cable coverage at approximately 97.55% of 78664. The same dataset reports download speeds up to 1 Gbps and upload speeds up to 35 Mbps. Current plans and actual service characteristics should be confirmed directly with Spectrum.
Is T-Mobile Home Internet available in 78664?
Current ZIP-level broadband data report T-Mobile Home Internet across most of 78664, with an estimated 97.43% fixed-wireless footprint. Eligibility remains dependent on the exact address and current network capacity. The ZIP-wide percentage does not establish identical service at every home.
Is Verizon 5G Home Internet available in 78664?
Current ZIP-level data report Verizon fixed-wireless coverage across roughly 93% of 78664. Verizon also has multiple local locations in Round Rock. Residential home-internet eligibility still has to be confirmed at the individual address.
Does 78664 have more than one fiber provider?
Yes. Current ZIP-level data identify substantial AT&T Fiber and Google Fiber footprints in 78664. Smaller fiber footprints are also reported for Astound Broadband and Hotwire Communications. The overlap is one of the defining characteristics of the ZIP's broadband market, although the networks do not necessarily reach the same properties.
Why did Google Fiber change the broadband market in Round Rock?
Round Rock already had established cable and telecom networks before Google Fiber entered the market. The city approved Google Fiber's right-of-way agreement in 2022, construction began in southeast Round Rock in 2023, and city officials reported continued microtrenching and network construction during 2024 and 2025. The result is an additional large fiber network layered onto an established suburban broadband market.
Can two nearby homes in 78664 have different providers?
Yes. Fiber construction boundaries, cable plant, building wiring and fixed-wireless capacity can all differ between nearby properties. Apartment and townhome developments can also have provider-specific infrastructure that does not match nearby single-family homes.
Why does this page include Optimum and Astound if Spectrum is widely available?
Current ZIP-level data identify smaller Optimum and Astound footprints inside 78664. Optimum is estimated at about 8% cable availability, while Astound is reported at about 6% cable and about 4% fiber. These smaller networks can materially change the available choices for a particular property even though they do not serve most of the ZIP.
Is the fastest advertised speed necessarily the best connection?
Not necessarily. Download speed is only one measure. Upload capacity, latency, congestion, equipment, installation, pricing after promotional periods and the actual network technology reaching the address should also be considered. This is especially relevant in 78664 because multi-gig fiber overlaps with high-capacity cable and fixed wireless.
Why does this page use ZIP-level data instead of claiming exact coverage?
ZIP-level datasets are useful for identifying the broadband market around 78664, but provider networks do not follow ZIP boundaries. The FCC's National Broadband Map uses location-level information because service can differ from one building or address to another. Treating a ZIP-wide percentage as proof of service at every address would overstate what the data establish.
Availability disclaimer: Provider names, technologies, advertised speeds, pricing and availability can change. ZIP-level broadband information does not guarantee service at an individual address. Apartment buildings, subdivisions and individual properties may have different network infrastructure. Always confirm service, technology, speed, equipment requirements and current pricing directly with the provider before ordering.
Check 78664 Availability