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: 415 [Rate centres in NPA 415] [Dial plan for NPA 415]

NXX: 944

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
415-944 A Sausalito CA SNFCCASY5MD  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722      
415-944 0 Sausalito CA SNTDCAUJCM9  6010 NEW CINGULAR WIRELESS PCS, LLC 722   2009-10-23   
415-944 1 Sausalito CA SNFCCASY5MD  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722   2005-04-03   
415-944 2 Sausalito CA SNFCCASY5MD  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722   2005-04-03   
415-944 3 Sausalito CA SNFCCASY5MD  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722   2010-09-04   
415-944 4 Sausalito CA SNFCCASY5MD  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722   2011-04-24   
415-944 5 Sausalito CA HYWRCAMCDS0  7240 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 722   2008-07-24   
415-944 6 Sausalito CA SNJSCAYB0MD  671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 722   2007-12-27   
415-944 7 Sausalito CA SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722   2011-03-06   
415-944 8 Sausalito CA SNFCCASY5MD  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722   2000-10-30   
415-944 9 Sausalito CA SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722   2010-12-10   

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

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.