Medina County
400 Mbps Air Fiber. No contracts. No data caps. Local support you can actually reach.
As the 'Little Alsace of Texas,' Castroville is known for its historic Alsatian architecture, the landmark Steinbach House, and the scenic Medina River that winds through the heart of town.
Broadband coverage here is inconsistent — some streets have AT&T fiber while others rely on Starlink at $120/month as the only real option. STI's ground-based Air Fiber covers all of Castroville with 400 Mbps for $65/month. No dish. No weather drops. No contract.
Zip codes served: 78009
Castroville is one of the more complicated coverage situations in our territory — the older neighborhoods closer to the historic district have seen AT&T fiber expansion on some streets, while outlying areas along FM 471 and outside the city limits remain satellite-or-nothing. STI's fixed wireless covers the majority of 78009, including neighborhoods that AT&T hasn't reached.
If you work remotely or run a business out of Castroville, the difference between AT&T fiber and STI isn't huge on speed — but STI has no annual contract and no installation fees. If AT&T hasn't run fiber to your street yet, STI is 400 Mbps now, not whenever the fiber truck shows up.
Castroville's proximity to San Antonio (30 minutes on US-90) means a lot of residents commute and work hybrid. Reliable upload speed — for video calls, shared drives, VPNs — matters as much as download. STI delivers 25 Mbps up consistently. That's what remote work actually runs on.
When something goes wrong, you call (830) 429-4149 — and you talk to someone who lives and works in South Texas. Not a ticket system. Not an overseas call center. And new customers are installed within one business day.
Broadband Facts
South Texas Internet
Velocity 400
Fixed Wireless Broadband
This Monthly Price is not an introductory rate.
This Monthly Price does not require a contract.
Additional Charges & Terms
Discounts & Bundles
Call (830) 429-4149 to ask about available discounts.
Speeds Provided with Plan
Data Included with Monthly Price
Customer Support: (830) 429-4149
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