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.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

NPA: 738 [Rate centres in NPA 738] [Dial plan for NPA 738]

NXX: 333

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
738-333 A Montebello CA   252F WIDE VOICE, LLC - CA 730   2025-11-30   
738-333 3 Montebello CA   252F WIDE VOICE, LLC - CA 730   2025-11-30   
738-333 4 Montebello CA   252F WIDE VOICE, LLC - CA 730   2025-11-30   
738-333 5 Montebello CA   252F WIDE VOICE, LLC - CA 730   2025-11-30   
738-333 6 Montebello CA   252F WIDE VOICE, LLC - CA 730   2025-11-30   
738-333 7 Montebello CA   252F WIDE VOICE, LLC - CA 730   2025-11-30   
738-333 8 Montebello CA   252F WIDE VOICE, LLC - CA 730   2025-11-30   

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

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.