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: 213 [Rate centres in NPA 213] [Dial plan for NPA 213]

NXX: 983

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
213-983 A Los Angeles: DA 04 CA   7139 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 730   2025-07-12   
213-983 6 Los Angeles: DA 04 CA   7139 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 730   2025-07-12   

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.