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.
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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
210-470 A San Antonio TX 9533 SOUTHWESTERN BELL 566      
210-531 A San Antonio TX 9533 SOUTHWESTERN BELL 566      
210-531 0 San Antonio TX 9533 SOUTHWESTERN BELL 566      
210-531 1 San Antonio TX 9533 SOUTHWESTERN BELL 566      
210-531 2 San Antonio TX 9533 SOUTHWESTERN BELL 566      
210-531 3 San Antonio TX 9533 SOUTHWESTERN BELL 566      
210-531 4 San Antonio TX 9533 SOUTHWESTERN BELL 566      
210-531 5 San Antonio TX 9533 SOUTHWESTERN BELL 566      
210-531 7 San Antonio TX 9533 SOUTHWESTERN BELL 566      
210-531 8 San Antonio TX 9533 SOUTHWESTERN BELL 566      
210-531 9 San Antonio TX 9533 SOUTHWESTERN BELL 566      
210-532 A San Antonio TX 9533 SOUTHWESTERN BELL 566      
210-533 A San Antonio TX 9533 SOUTHWESTERN BELL 566      
210-534 A San Antonio TX 9533 SOUTHWESTERN BELL 566      
210-634 8 San Antonio TX 9533 SOUTHWESTERN BELL 566   2022-05-13   

Last updated: Fri, 13 May 2022 22:16:13 UTC

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