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: 200

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
738-200 A Los Angeles: DA 10 CA   6529 T-MOBILE USA, INC. 730   2025-12-21   
738-200 0 Los Angeles: DA 10 CA   145J TERRA NOVA TELECOM INC. 730   2025-12-22   
738-200 8 Los Angeles: DA 10 CA   6529 T-MOBILE USA, INC. 730   2025-12-21   
738-200 9 Los Angeles: DA 10 CA   6529 T-MOBILE USA, INC. 730   2025-12-21   

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.