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]

Region: TX

OCN: 473F USFON, INC. - TX

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
210-210 A San Antonio TX SNAOTXWC0MD  566      
210-210 0 San Antonio TX SNAOTXWC0MD  566   2023-03-10   
210-210 2 San Antonio TX SNAOTXWC0MD  566   2023-03-10   
210-210 3 San Antonio TX SNAOTXWC0MD  566   2023-03-10   
210-210 4 San Antonio TX SNAOTXWC0MD  566   2023-03-10   
210-210 5 San Antonio TX SNAOTXWC0MD  566   2023-03-10   
210-210 7 San Antonio TX SNAOTXWC0MD  566   2023-03-10   
210-210 8 San Antonio TX SNAOTXWC0MD  566   2023-03-10   
210-210 9 San Antonio TX SNAOTXWC0MD  566   2023-03-10   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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