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: 210 [Rate centres in NPA 210] [Dial plan for NPA 210]

NXX: 256

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
210-256 A San Antonio TX SNANTXCUDS0  9533 SOUTHWESTERN BELL 566      
210-256 0 San Antonio TX SNANTXCUDS0  9533 SOUTHWESTERN BELL 566      
210-256 1 San Antonio TX SNANTXCUDS0  9533 SOUTHWESTERN BELL 566      
210-256 2 San Antonio TX SNANTXDIRMD  903C ONVOY, LLC - TX 566      
210-256 3 San Antonio TX SNANTXCUDS0  9533 SOUTHWESTERN BELL 566      
210-256 4 San Antonio TX SNANTXCUDS0  9533 SOUTHWESTERN BELL 566      
210-256 5 San Antonio TX SNANTXCUDS0  9533 SOUTHWESTERN BELL 566      
210-256 6 San Antonio TX SNANTXCUDS0  9533 SOUTHWESTERN BELL 566      
210-256 7 San Antonio TX SNANTXCA80Z  624H ONVOY SPECTRUM, LLC 566      
210-256 8 San Antonio TX SNANTXCUDS0  9533 SOUTHWESTERN BELL 566      
210-256 9 San Antonio TX SNANTXCA34Z  004F BANDWIDTH.COM CLEC, LLC - TX 566      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

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