Prefix overview
Phone numbers in prefix 210-343
This page covers the 210-343 prefix in the United States. It shows where numbers come from, which carrier is linked to the range, and how this block is structured.
If you are looking for a specific number, you can continue to its dedicated phone page. Otherwise, this page helps you understand the broader number block behind it.
PREFIX
210-343
RATE CENTER
SANANTONIO
CARRIER
SOUTHWESTERN BELL
TX
Prefix range
The prefix 210-343 includes numbers from 2103430000 to 2103439999.
This range is associated with the SANANTONIO rate center and was originally assigned to SOUTHWESTERN BELL.
Numbers in this prefix
20 numbers