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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Switch: CRCYTXCCRS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
830-374 A Crystal City TX 9533 SOUTHWESTERN BELL 566      
830-374 1 Crystal City TX 9533 SOUTHWESTERN BELL 566      
830-374 2 Crystal City TX 9533 SOUTHWESTERN BELL 566      
830-374 3 Crystal City TX 9533 SOUTHWESTERN BELL 566      
830-374 4 Crystal City TX 9533 SOUTHWESTERN BELL 566      
830-374 5 Crystal City TX 9533 SOUTHWESTERN BELL 566      
830-374 8 Crystal City TX 9533 SOUTHWESTERN BELL 566      
830-374 9 Crystal City TX 9533 SOUTHWESTERN BELL 566      

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

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