Broadband in 77021 has a strong wired foundation, with AT&T Fiber competing against an extensive Xfinity cable network. Current ZIP-level records also identify smaller Xfinity fiber coverage and fixed-wireless alternatives from T-Mobile and Verizon. The result is a more address-specific market than the provider list alone suggests.
Enter a five-digit ZIP code to open the corresponding local broadband guide.
77021 is not primarily a two-cable-provider market. Current ZIP-level records point to a large AT&T fiber footprint alongside an exceptionally broad Xfinity cable footprint. Fixed wireless adds another layer, while smaller providers appear only in limited portions of the ZIP.
Current ZIP-level datasets report AT&T Fiber across about 82% of 77021, with reported maximum speeds reaching 5 Gbps. AT&T's current Houston information also confirms fiber service in the Houston market and requires an address check for exact eligibility.
Current ZIP-level records report Xfinity cable across approximately 99.9% of 77021. Most of that reported footprint is cable rather than fiber, making Xfinity the principal cable network against which AT&T Fiber is likely to be compared.
The table separates broad ZIP-level network evidence from the final address-level ordering decision. Coverage percentages come from provider-reported broadband datasets and should not be interpreted as guarantees for individual houses or apartment units.
| Provider | Technology | 77021 evidence | Advertised maximum | Verify |
|---|---|---|---|---|
|
AT&T Fiber
Major fiber footprint
|
Fiber | Current ZIP-level records report AT&T Fiber across about 82% of 77021. | Up to 5 Gbps where available | |
|
Xfinity
Near-ZIP-wide cable footprint
|
Cable; limited fiber reported | Current ZIP-level records report Xfinity cable across roughly 99.9% of 77021. A smaller Xfinity fiber footprint is also reported. | Up to 2 Gbps in applicable locations | |
|
T-Mobile Home Internet
Local ZIP presence
|
5G fixed wireless | T-Mobile operates a Home Internet-enabled location at 6120 Scott Street in 77021. ZIP-level records also report substantial fixed-wireless coverage. | Plan and location dependent | |
|
Verizon 5G Home Internet
Fixed-wireless evidence
|
5G fixed wireless | Current ZIP-level datasets report Verizon fixed-wireless service in 77021. The reported footprint makes Verizon worth checking separately from T-Mobile. | Plan and location dependent | |
|
Astound Broadband
Very limited footprint
|
Cable | Current ZIP-level datasets identify approximately 1% Astound Broadband cable coverage in 77021. It should be treated as a property-specific possibility, not a ZIP-wide alternative. | Up to about 1.5 Gbps where reported | Verify the exact property |
|
EarthLink
Underlying-network provider
|
Fiber / DSL / fixed wireless | ZIP-level datasets list EarthLink across multiple technologies. Much of the fiber evidence corresponds to the same underlying infrastructure represented by AT&T, so it is not treated here as a separate physical fiber network. | Up to 5 Gbps where fiber is available | Check the service address and underlying network |
|
Satellite providers
Broad geographic option
|
Satellite | Satellite service is geographically available in 77021 and does not depend on the local fiber or cable plant. | Provider and plan dependent | Check current provider terms |
The providers below are organized around the network evidence that matters in 77021. Resellers and small footprints are kept distinct from the major physical networks so the local market is not overstated.
AT&T Fiber is the most significant fiber network identified in current 77021 records. One current ZIP-level dataset estimates fiber availability at about 82% of the ZIP, making fiber a realistic comparison for a large share of 77021 addresses rather than a small-edge deployment.
Xfinity is the dominant cable network reported in 77021. Current ZIP-level data place cable availability at roughly 99.9%, making Xfinity the most geographically widespread wired option in the ZIP. The same datasets report a smaller Xfinity fiber footprint, so the brand should not automatically be treated as synonymous with one technology at every address.
T-Mobile has direct evidence of Home Internet operations inside 77021. Its Scott Street location at 6120 Scott Street, Suite B40, explicitly lists T-Mobile Home Internet and provides an availability check. ZIP-level data also identify a substantial fixed-wireless footprint.
Verizon is relevant to 77021 as a fixed-wireless competitor. Current ZIP-level records report Verizon fixed-wireless availability across a substantial portion of the ZIP. That makes it a useful independent check when a property has limited wired choices or when residents want to compare a wireless connection with cable or fiber.
Astound Broadband appears in current 77021 broadband records, but the reported footprint is very small compared with Xfinity and AT&T. The practical significance is therefore limited to specific properties that fall inside the reported local network.
EarthLink appears prominently in third-party 77021 provider datasets, including fiber listings that largely overlap the AT&T fiber footprint. For local network analysis, EarthLink is more useful as a service brand riding underlying infrastructure than as evidence of a separate fiber construction project in the ZIP.
Satellite broadband remains geographically relevant in 77021 even though the ZIP has strong terrestrial infrastructure. It can serve as a fallback when an individual property cannot obtain a preferred wired or fixed-wireless service.
Some ZIP-level datasets continue to identify AT&T DSL or other legacy wired service in 77021 alongside fiber. This matters because the AT&T brand alone does not tell a household which technology reaches the property.
The local market includes multi-gigabit fiber and cable alongside fixed-wireless options. In this ZIP, the technology behind the advertised download number is especially important because upload performance can differ substantially between AT&T Fiber and Xfinity cable.
Suitable for ordinary browsing, video calls, streaming and moderate household use when the connection is stable.
Useful for households with several simultaneous users, streaming devices and regular large downloads.
Relevant to larger households and high-volume usage when the local address supports the corresponding tier.
AT&T currently advertises up to 5 Gbps in Houston where available. The actual 77021 address and installed network determine eligibility.
77021 has a strong terrestrial broadband base, but the networks do not have identical footprints. Housing type and the specific street or building can affect which technology is actually available.
AT&T Fiber is the principal fiber network reported in 77021, with current ZIP-level datasets estimating coverage around 82%. A smaller Xfinity fiber footprint is also reported. Fiber availability should be checked at the exact property.
Xfinity cable is the dominant cable network in 77021, with current ZIP-level datasets reporting coverage across nearly the entire ZIP. Download capacity can be high, but upload performance differs from fiber and can vary by plan and network segment.
T-Mobile and Verizon provide fixed-wireless alternatives. T-Mobile has a Home Internet-enabled location directly inside 77021 at Scott Street. Wireless eligibility remains dependent on capacity and the individual address.
Satellite remains geographically available independent of the local fiber and cable plant. It is technically different from terrestrial broadband, particularly in latency and equipment requirements.
77021 sits in Houston's central-south urban area and includes portions of the Third Ward, MacGregor and Medical Center-related areas as well as OST–South Union and established residential subdivisions. The ZIP also contains a mixture of older single-family housing, apartments, student housing and newer multifamily construction. Those differences matter when translating ZIP-level network data into an actual service choice.
Current ZIP-level records estimate AT&T Fiber availability at approximately 82% of 77021. That is large enough to make fiber a central part of the local provider comparison rather than a small edge footprint. The figure still does not establish service at every address.
Current ZIP-level records report Xfinity cable across approximately 99.9% of 77021. This makes the local wired comparison unusual in a useful way: a large AT&T fiber footprint overlaps an almost ZIP-wide cable network rather than competing with a small cable footprint.
T-Mobile's official retail information lists Home Internet at 6120 Scott Street, Suite B40, Houston, TX 77021. This does not prove every nearby property qualifies, but it provides direct local evidence that Home Internet is an active T-Mobile service category within the ZIP.
ZIP-level datasets report meaningful fixed-wireless coverage from T-Mobile and Verizon. The practical result can vary by capacity, signal and the physical characteristics of a building. A strong mobile signal is not by itself proof that the same address can order a home-internet plan.
Housing records for 77021 show many established subdivisions with homes commonly dating from the 1940s through the 1970s, alongside newer apartment and condominium developments. This mix matters because internal building wiring and existing service infrastructure can differ significantly between a detached home and a newer multifamily property.
Parts of 77021 are closely connected to the Texas Medical Center and include substantial apartment and renter-oriented housing. A resident moving into a multifamily building should verify the building or unit rather than using a nearby single-family address as a proxy for service availability.
These findings focus on what the available evidence means for a 77021 address rather than simply repeating the provider list.
| Finding | Evidence | What it means for a 77021 address |
|---|---|---|
| AT&T Fiber | Current ZIP-level datasets report approximately 82% fiber coverage | Fiber is a major local option and should be checked before assuming cable is the only high-capacity wired service. |
| Xfinity cable | Current ZIP-level datasets report roughly 99.9% cable coverage | Xfinity is the broadest reported wired network in the ZIP, making it the principal cable comparison for AT&T Fiber. |
| Xfinity fiber | A smaller Xfinity fiber footprint is reported | The Xfinity brand should not automatically be equated with cable at every address. |
| T-Mobile Home Internet | Official T-Mobile location at 6120 Scott Street lists Home Internet | T-Mobile is a documented local service category, but residential eligibility must be checked by address. |
| Verizon 5G Home | Current ZIP-level records report Verizon fixed-wireless coverage | Verizon should be checked independently rather than treated as interchangeable with T-Mobile. |
| Astound | Current datasets report approximately 1% cable coverage | Astound may matter to specific properties but is not a major ZIP-wide competitor. |
| EarthLink | Third-party datasets report fiber, DSL and wireless service | EarthLink should be understood as a service brand that can use underlying networks rather than automatically counted as another independent physical network. |
| Housing differences | 77021 contains older subdivisions and newer multifamily development | Building wiring and property infrastructure can affect the final provider list even when ZIP-level coverage appears extensive. |
These areas help explain why the ZIP-level provider list should not be treated as a uniform map of service at every property.
Neighboring ZIP codes can have different network footprints. Use them as separate research areas rather than transferring 77021 availability assumptions across ZIP boundaries.
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.
For apartments and other multifamily buildings, verify service using the complete building address and unit information where requested. Existing coaxial or fiber wiring, building agreements and installed equipment can affect the available provider list. A nearby detached home is not a reliable proxy for a multifamily building.
The local evidence makes technology and property-level availability more useful comparison points than simply ranking providers by maximum speed.
AT&T Fiber can provide much higher upload capacity than traditional cable tiers where available. This difference can matter for cloud backups, remote work, large file transfers and other upload-heavy uses.
Xfinity is reported across nearly all of 77021, while AT&T Fiber reaches a large majority. The important question at a specific address is whether both networks are actually orderable there.
Apartment and condominium properties can have internal wiring and provider arrangements that differ from nearby houses. The building's service options can therefore be more informative than the ZIP-wide provider list.
ZIP-level research identifies the local market. Provider address tools determine what can actually be ordered at the property.
This page gives greater weight to official provider information for provider-specific service claims and uses current FCC Broadband Data Collection-derived datasets as a secondary ZIP-level coverage layer.
Answers are based on the current provider information and ZIP-specific broadband evidence reviewed for this guide.