Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

Switch: SNANTXPEDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
210-585 A San Antonio TX 9533 SOUTHWESTERN BELL 566      
210-731 A San Antonio TX 9533 SOUTHWESTERN BELL 566      
210-732 A San Antonio TX 9533 SOUTHWESTERN BELL 566      
210-733 A San Antonio TX 9533 SOUTHWESTERN BELL 566      
210-734 A San Antonio TX 9533 SOUTHWESTERN BELL 566      
210-735 A San Antonio TX 9533 SOUTHWESTERN BELL 566      
210-736 A San Antonio TX 9533 SOUTHWESTERN BELL 566      
210-737 A San Antonio TX 9533 SOUTHWESTERN BELL 566      
210-738 A San Antonio TX 9533 SOUTHWESTERN BELL 566      
210-785 A San Antonio TX 9533 SOUTHWESTERN BELL 566      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.