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.

Maxwell, CA

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
530-438 A MXWLCAXFRS0  3402 CITIZENS TELECOMM DBA FRONTIER COMM GOLDEN STATE 726      
530-438 0 MXWLCAXFRS0  3402 CITIZENS TELECOMM DBA FRONTIER COMM GOLDEN STATE 726      
530-438 2 MXWLCAXFRS0  3402 CITIZENS TELECOMM DBA FRONTIER COMM GOLDEN STATE 726      
530-438 4 SCRMCA0121Z  671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 726      
530-438 6 SCRMCA01X2Z  7145 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 726      
530-438 7   8826 LEVEL 3 COMMUNICATIONS, LLC - CA 726      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.