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: 323 [Rate centres in NPA 323] [Dial plan for NPA 323]

NXX: 404

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
323-404 A Los Angeles: DA 03 CA IRVECAEIDS0  7240 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 730      
323-404 0 Los Angeles: DA 03 CA ELMNCAFIGT1  6529 T-MOBILE USA, INC. 730   2005-12-05   
323-404 1 Los Angeles: DA 03 CA ELMNCAFIGT1  6529 T-MOBILE USA, INC. 730   2005-12-05   
323-404 2 Los Angeles: DA 03 CA ELMNCAFIGT1  6529 T-MOBILE USA, INC. 730   2004-11-12   
323-404 3 Los Angeles: DA 03 CA ELMNCAFIGT1  6529 T-MOBILE USA, INC. 730   2004-11-12   
323-404 4 Los Angeles: DA 03 CA ELMNCAFIGT1  6529 T-MOBILE USA, INC. 730   2004-11-12   
323-404 5 Los Angeles: DA 03 CA ELMNCAFIGT1  6529 T-MOBILE USA, INC. 730   2004-11-12   
323-404 6 Los Angeles: DA 03 CA ELMNCAFIGT1  6529 T-MOBILE USA, INC. 730   2004-11-12   
323-404 7 Los Angeles: DA 03 CA ELMNCAFIGT1  6529 T-MOBILE USA, INC. 730   2004-11-12   
323-404 8 Los Angeles: DA 03 CA ELMNCAFIGT1  6529 T-MOBILE USA, INC. 730   2006-02-06   
323-404 9 Los Angeles: DA 03 CA IRVECAEIDS0  7240 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 730      

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.