Internet Providers in 78664

Round Rock, TX (78664) has 9 broadband providers and an HHI of 2,084 — inside the DOJ's moderately concentrated band (1,500–2,500), where comparing the two leading offers usually pays off. ZIP 78664 (Round Rock, TX) has a moderately concentrated broadband market (HHI: 2,084) where Spectrum leads with 78% coverage reach — 12 percentage points ahead of the next-largest provider, T-Mobile at 66%. With one provider this dominant, ZIP 78664 (Round Rock, TX) households often have fewer competing deals to play off each other, and the leader faces little urgency to cut prices or upgrade speeds. The remaining 4 providers in ZIP 78664 (Round Rock, TX) cover a fraction of addresses, limiting their competitive impact. Per FCC findings, households in lopsided markets like this tend to pay more each month than those in areas with multiple competitive wired providers.

In the immediate vicinity of ZIP 78664, verified infrastructure supports fiber speeds up to 8 Gbps, cable speeds up to 1.5 Gbps.

The Herfindahl-Hirschman Index (HHI) for this ZIP code — calculated from each wired and fixed-wireless provider's share of local coverage — is 2,084, classifying it as a moderately concentrated market under U.S. Department of Justice guidelines. A moderately concentrated market offers some competition, but dominant providers may still have significant pricing power.

Fiber availability at 64% is modestly ahead of the national average of 57%, putting ZIP code 78664 (Round Rock, TX) slightly ahead of the nationwide fiber buildout curve. Nationally, fiber coverage is expanding by roughly 8 percentage points per year, driven by BEAD infrastructure grants and private carrier investment from AT&T, Frontier, and Google Fiber. Fiber-optic coverage here is above average and growing. Nationally, fiber availability has expanded by roughly 8 percentage points per year since 2022, with ISPs like AT&T, Frontier, and Google Fiber leading the rollout of high-speed internet.

Fiber internet is available from 3 providers (AT&T Internet, Google Fiber, Optimum), with 64% fiber coverage, near the national average of 57%. Fiber delivers symmetrical upload and download speeds — a key advantage for households with multiple remote workers, video conference participants, or content creators who upload large files. Nationally, fiber represents the fastest-growing broadband technology segment, expanding at roughly 8 percentage points of coverage per year. Spectrum provides the primary cable broadband alternative with 78% coverage — above-average cable coverage of 72%. Cable internet uses DOCSIS 3.1 technology to deliver download speeds of 100 Mbps to 1.2 Gbps, though upload speeds (typically 10-35 Mbps) lag behind fiber's symmetrical performance. For households that do not require heavy upstream bandwidth, cable plans often offer competitive pricing to fiber. Fixed wireless internet — including 5G home internet services — is available from T-Mobile and AT&T Internet, reaching 66% of addresses (well above the national fixed wireless average of 32%). Fixed wireless offers a no-installation alternative that is increasingly competitive with cable for everyday internet use, with speeds typically ranging from 50-300 Mbps download. Unlike satellite, fixed wireless delivers lower latency (20-40 ms), making it viable for video conferencing and gaming. Satellite internet (Starlink, Viasat, HughesNet) reaches addresses that wired broadband can't. Starlink's low-Earth-orbit (LEO) technology delivers 20-60 ms latency — a major improvement over geostationary services at 600+ ms — making it a practical choice for rural households without fixed-line options.

Residents of ZIP code 78664 can choose from plans starting at $30/mo (Spectrum Internet Advantage, 100 Mbps download) up to 1.2 Gbps (Optimum 1 Gig Fiber Internet at $65/mo). Across all 18 plans available, the median price point offers a balance of speed and affordability for typical household needs.

The technology mix in 78664 includes 3 fiber providers (33% of options), 1 cable provider, 2 fixed wireless/5G providers. Fiber optic connections deliver the fastest and most reliable performance with symmetric upload and download speeds, making them ideal for remote work, gaming, and 4K streaming.

Texas received $3.3 billion in federal BEAD funding. The Texas Broadband Development Office is currently in the challenge phase, which means providers and communities can dispute the FCC broadband maps that determine which locations qualify for funding — a critical step before deployment grants are awarded. The Affordable Connectivity Program (ACP) previously provided up to $30/month subsidies for eligible households, though federal funding expired in 2024. Some providers continue offering voluntary low-income discounts.

Market data is based on the FCC Broadband Data Collection (June 2025). Actual coverage and plan availability may vary by specific address within ZIP code 78664.

Technology Availability

Fiber-optic internet is available from 3 providers (AT&T Internet, Google Fiber, Optimum), with the highest fiber coverage reaching 64% of addresses. Cable broadband from Spectrum covers 78% of the area. 3 fixed wireless or 5G home internet options are available. satellite internet serves as a backup for addresses outside wired coverage areas. The technology mix in Round Rock determines the range of speeds and prices residents can access for home internet service.

Pricing Overview

Internet plans in Round Rock range from $30/month to $129.99/month, with an average of $71/month — $6/month above the national average of $65/month. Fiber plans average $60/month locally, a $15 premium over cable at $45/month. The price difference buys symmetrical upload speeds and typically more reliable performance, which may justify the cost for remote workers and heavy uploaders. The most affordable option is Spectrum starting at $30/month for 100 Mbps speeds. At the top end, HughesNet's 25 Mbps plan costs $129.99/month — best suited for large households or home offices needing maximum bandwidth. Residents of TX should compare at least 2-3 providers before committing, as pricing varies significantly by plan tier and technology type.

Market Competition

Broadband competition in Round Rock comes down to a contest between Spectrum (78% of addresses) and T-Mobile (66%). That works out to an HHI of 2,084, inside the DOJ's moderately concentrated band (1,500–2,500): neither a monopoly nor a wide-open field. Beyond the top two, coverage drops off (the smallest footprint reaches 11%), which makes quotes from both leading providers the most reliable negotiating lever.

Speed Options

Internet speeds in Round Rock range from 12 Mbps to 1.2 Gbps. The fastest available plan is Optimum's 1.2 Gbps fiber service at $65/month. Fiber connections deliver symmetrical upload and download speeds — a significant advantage over cable, where upload speeds are typically capped at 10-35 Mbps regardless of download tier. For households with remote workers or content creators, fiber's upload performance is a meaningful differentiator. With 1.2 Gbps service, households can support 48+ simultaneous 4K streams, lag-free competitive gaming, and large file transfers without congestion. For most households, 365 Mbps plans from Optimum offer the best balance of speed and cost for everyday use.

Our Recommendation

For most Round Rock residents, we recommend starting with fiber internet if available at your address — Optimum's 1.2 Gbps plan at $65/month offers the best combination of speed and value. For budget-conscious households, Spectrum's 100 Mbps plan at $30/month delivers essential connectivity at a low monthly cost. Remote workers should prioritize AT&T Internet's fiber service for its symmetrical upload speeds, which far exceed cable alternatives for video conferencing and cloud backups. Gamers should consider Optimum's 1.2 Gbps fiber plan — fiber provides the lowest latency (typically 5-15 ms) for competitive online gaming. For households of 4+ people with multiple connected devices, Optimum's 1.2 Gbps plan at $65/month provides enough bandwidth for simultaneous streaming, gaming, and video calls. Always verify availability at your exact address, as coverage can vary block by block in Round Rock.