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: 524

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
415-524 A San Rafael CA OKLDCAEBDS0  7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
415-524 0 San Rafael CA SNFCCASY5MD  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722   2012-11-18   
415-524 1 San Rafael CA OKLDCAEBDS0  7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 722      
415-524 2 San Rafael CA FRMTCAEDDS2  7262 XO CALIFORNIA, INC. 722   2010-09-16   
415-524 3 San Rafael CA FRFECABBCM0  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722   2012-10-31   
415-524 4 San Rafael CA FRMTCAEDDS2  7262 XO CALIFORNIA, INC. 722   2006-11-17   
415-524 5 San Rafael CA OKLECAZVGT0  5562 METRO PCS, INC. 722   2007-09-22   
415-524 6 San Rafael CA OKLECAZVGT0  5562 METRO PCS, INC. 722   2007-09-22   
415-524 7 San Rafael CA SNFCCASY5MD  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722   2008-05-20   
415-524 8 San Rafael CA OKLDCA03XOY  318J COMCAST IP PHONE LLC 722   2008-04-24   
415-524 9 San Rafael CA OKLECAZVGT0  5562 METRO PCS, INC. 722   2008-12-17   

Last updated: Tue, 04 May 2021 15:04:27 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.