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: SNANTXDIRS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
210-259 A San Antonio TX 9533 SOUTHWESTERN BELL 566      
210-259 0 San Antonio TX 9533 SOUTHWESTERN BELL 566      
210-259 2 San Antonio TX 9533 SOUTHWESTERN BELL 566      
210-259 4 San Antonio TX 9533 SOUTHWESTERN BELL 566      
210-375 A San Antonio TX 9533 SOUTHWESTERN BELL 566      
210-375 0 San Antonio TX 9533 SOUTHWESTERN BELL 566      
210-375 1 San Antonio TX 9533 SOUTHWESTERN BELL 566      
210-375 2 San Antonio TX 9533 SOUTHWESTERN BELL 566      
210-375 7 San Antonio TX 9533 SOUTHWESTERN BELL 566      
210-375 8 San Antonio TX 9533 SOUTHWESTERN BELL 566      
210-530 A San Antonio TX 9533 SOUTHWESTERN BELL 566      
210-530 0 San Antonio TX 9533 SOUTHWESTERN BELL 566      
210-530 2 San Antonio TX 9533 SOUTHWESTERN BELL 566      
210-530 3 San Antonio TX 9533 SOUTHWESTERN BELL 566      
210-530 5 San Antonio TX 9533 SOUTHWESTERN BELL 566      
210-530 6 San Antonio TX 9533 SOUTHWESTERN BELL 566      
210-530 7 San Antonio TX 9533 SOUTHWESTERN BELL 566      
210-530 9 San Antonio TX 9533 SOUTHWESTERN BELL 566      

Last updated: Wed, 04 Mar 2026 03:00:52 UTC

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