Internet Providers in Seguin, TX
ZIP code 78155 · 4 providers
Fiber internet is available in 78155 through AT&T, offering symmetrical speeds up to 5 Gbps. Cable internet is provided by Spectrum. Based on M-Lab speed tests, AT&T customers in 78155 see a median download of 278 Mbps — 6% of the advertised speed. Plans start at $30/mo.
A single 0–100 rating for 78155 from real speed tests, provider choice, price value, and latency — data most comparison sites don't show.
How 78155 compares to nearby areas
Internet quality can change street to street. Here's how neighboring ZIP codes score.
Frequently asked questions
4 providers serve Seguin, TX 78155: AT&T, Spectrum, T-Mobile, Verizon. Availability varies by exact street address — enter your address on the provider's site to confirm.
AT&T advertises the highest speed in this ZIP at 5 Gbps via fiber. Real-world median based on M-Lab tests: 278 Mbps.
Yes — AT&T offer fiber optic internet in 78155. Fiber provides the most consistent speeds and symmetrical upload bandwidth.
Guides
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How Much Internet Speed Do You Actually Need?
Most households are paying for 3–10x more than they use
Advertised vs Real Internet Speeds
The gap between the ad and your actual connection — measured, not estimated
The Cheapest Internet Plans, Compared Honestly
Standard published rates — not promotional prices that double after a year
Coverage: FCC Broadband Data Collection · Speeds: M-Lab NDT (24-month median) · Updated 2026-07-12