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.

San Mateo, CA

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
650-293 2 HYWRCA115MD  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 722   2005-09-15   
650-293 3 HYWRCA115MD  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 722   2005-09-15   
650-293 4 HYWRCA115MD  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 722   2005-09-15   
650-293 5 SNMTCA11DS0  9740 PACIFIC BELL 722      
650-293 6 SNMTCA11DS0  9740 PACIFIC BELL 722      
650-293 7 OKLECAZVGT0  6529 T-MOBILE USA, INC. 722   2006-08-25   
650-293 8 SNFCCASY5MD  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722   2005-03-27   
650-293 9 SNFCCASY5MD  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722   2005-03-27   
650-294 A SNMTCA11DS0  9740 PACIFIC BELL 722      
650-294 0 HYWRCAMCDMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722   2013-06-10   
650-294 1 SNMTCA11DS0  9740 PACIFIC BELL 722      
650-294 2 SNMTCA11DS0  9740 PACIFIC BELL 722      
650-294 3 SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2006-09-01   
650-294 4 SNFCCAMKX1X  9262 UTILITY TELECOM GROUP, LLC - CA 722   2006-06-14   
650-294 5 SNMTCA11DS0  9740 PACIFIC BELL 722      
650-294 6 SNMTCA11DS0  9740 PACIFIC BELL 722      
650-294 7 SNMTCA11DS0  9740 PACIFIC BELL 722      
650-294 8 SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722   2014-03-27   
650-294 9 SNFCCAMMDS7  258E YMAX COMMUNICATIONS CORP. - CA 722   2010-03-03   
650-295 A SNMTCA11DS0  9740 PACIFIC BELL 722      
650-295 0 SNFCCASY5MD  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722   2008-02-01   
650-295 1 SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2011-08-17   
650-295 2 SNMTCA11DS0  9740 PACIFIC BELL 722      
650-295 3 SNMTCA11DS0  9740 PACIFIC BELL 722      
650-295 4 SNMTCA11DS0  9740 PACIFIC BELL 722      
650-295 5 SNMTCA11DS0  9740 PACIFIC BELL 722      
650-295 6 SNMTCA11DS0  9740 PACIFIC BELL 722      
650-295 7 SNMTCA11DS0  9740 PACIFIC BELL 722      
650-295 8 SNMTCA11DS0  9740 PACIFIC BELL 722      
650-295 9 OKLECAZVGT0  5562 METROPCS, INC. 722   2008-06-01   
650-312 A SNMTCA11DS0  9740 PACIFIC BELL 722      
650-315 A   6529 T-MOBILE USA, INC. 722      
650-315 0 HYWRCAMCDMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722   2011-06-07   
650-315 1   6529 T-MOBILE USA, INC. 722      
650-315 2 SNFCCA01XGX  516C AT&T CORP. 722   2006-06-30   
650-315 3 OKLECAZVGT0  6529 T-MOBILE USA, INC. 722      
650-315 4 OKLECAZVGT0  6529 T-MOBILE USA, INC. 722      
650-315 5 OKLECAZVGT0  6529 T-MOBILE USA, INC. 722      
650-315 6   6529 T-MOBILE USA, INC. 722      
650-315 7 OKLECAZVGT0  6529 T-MOBILE USA, INC. 722      
650-315 8 OKLECAZVGT0  6529 T-MOBILE USA, INC. 722      
650-315 9   6529 T-MOBILE USA, INC. 722      
650-340 A BRLNCA01DS0  9740 PACIFIC BELL 722      
650-341 A SNMTCA11DS1  9740 PACIFIC BELL 722      
650-342 A BRLNCA01DS0  9740 PACIFIC BELL 722      
650-343 A BRLNCA01DS0  9740 PACIFIC BELL 722      
650-344 A BRLNCA01DS0  9740 PACIFIC BELL 722      
650-345 A SNMTCA11DS1  9740 PACIFIC BELL 722      
650-346 A   6529 T-MOBILE USA, INC. 722      
650-346 0 OKLECAZVGT0  6529 T-MOBILE USA, INC. 722      

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 >>

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.