The area code 346 is located in Alvin, Texas.
Area code 346 serves Alvin, Texas, as part of an all-services overlay for Greater Houston that also includes 713, 281, and 832. Alvin sits in Brazoria County, just south of Houston, with fast routes to the Gulf Coast. The 346 area code was introduced in 2014 to add more phone numbers for a growing region. Because it’s an overlay, 10-digit dialing is required for local calls across the entire Houston area.
This overlay covers Alvin and many nearby communities and landmarks across the metro, including:
For local history, 713 was Houston’s original area code (assigned in 1947). 281 split from 713 in 1996, 832 overlaid the region in 1999, and 346 joined in 2014 to meet demand from mobile phones and new lines. New phone numbers in Alvin may be assigned 346, 832, 281, or 713, depending on availability, and existing numbers keep their current codes. “10-digit dialing is mandatory in overlay area codes.” — Federal Communications Commission (FCC)
What this means for callers: you’ll dial the area code plus the seven-digit number for all local calls in Alvin and across Greater Houston. The 346 overlay makes it easier to add lines for homes, schools, and businesses without changing the local calling area. It also supports important destinations like the Port of Houston, the Texas Medical Center, and major highways that link Alvin to the rest of the metro. If you see a 346 number on your phone, it’s likely tied to Alvin or another part of the Houston region.