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: 737 [Rate centres in NPA 737] [Dial plan for NPA 737]

NXX: 448

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
737-448 A Dripping Springs TX   5562 METROPCS, INC. 558   2026-07-14   
737-448 9 Dripping Springs TX   5562 METROPCS, INC. 558   2026-07-14   

Last updated: Tue, 16 Jun 2026 00:09:45 UTC

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