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
650-544 6 OKLECAZVGT0  6529 T-MOBILE USA, INC. 722      
650-544 7 OKLECAZVGT0  6529 T-MOBILE USA, INC. 722      
650-544 8   5562 METROPCS, INC. 722      
650-544 9   5562 METROPCS, INC. 722      
650-548 A BRLNCA01DS0  9740 PACIFIC BELL 722      
650-554 A SNMTCA11DS0  9740 PACIFIC BELL 722      
650-554 0 HYWRCAMCDMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722   2011-02-10   
650-554 1 HYWRCAMCDMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722   2011-05-07   
650-554 2 SNMTCA11DS0  9740 PACIFIC BELL 722      
650-554 3 SNMTCA11DS0  9740 PACIFIC BELL 722      
650-554 4 SNMTCA11DS0  9740 PACIFIC BELL 722      
650-554 5 SNMTCA11DS0  9740 PACIFIC BELL 722      
650-554 6 SNMTCA11DS0  9740 PACIFIC BELL 722      
650-554 7 SNMTCA11DS0  9740 PACIFIC BELL 722      
650-554 8 HYWRCAMCDMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722   2011-05-07   
650-554 9 HYWRCAMCDMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722   2013-02-16   
650-558 A BRLNCA01DS0  9740 PACIFIC BELL 722      
650-570 A SNMTCA11DS1  9740 PACIFIC BELL 722      
650-570 0 SNMTCA11DS1  9740 PACIFIC BELL 722      
650-570 1 SNFCCAMKX1X  9262 UTILITY TELECOM GROUP, LLC - CA 722      
650-570 2 SNMTCA11DS1  9740 PACIFIC BELL 722      
650-570 3 SNMTCA11DS1  9740 PACIFIC BELL 722      
650-570 4 SNMTCA11DS1  9740 PACIFIC BELL 722      
650-570 5 SNMTCA11DS1  9740 PACIFIC BELL 722      
650-570 6 SNMTCA11DS1  9740 PACIFIC BELL 722      
650-570 7 SNMTCA11DS1  9740 PACIFIC BELL 722      
650-570 8 SNFCCAMKX1X  9262 UTILITY TELECOM GROUP, LLC - CA 722      
650-570 9 SNFCCAMKX1X  9262 UTILITY TELECOM GROUP, LLC - CA 722      
650-571 A SNMTCA11DS1  9740 PACIFIC BELL 722      
650-571 0 SNMTCA11DS1  9740 PACIFIC BELL 722      
650-571 1 SNMTCA11DS1  9740 PACIFIC BELL 722      
650-571 2 SNMTCA11DS1  9740 PACIFIC BELL 722      
650-571 3 SNFCCAMKX1X  9262 UTILITY TELECOM GROUP, LLC - CA 722      
650-571 4 SNFCCAMKX1X  9262 UTILITY TELECOM GROUP, LLC - CA 722      
650-571 5 SNMTCA11DS1  9740 PACIFIC BELL 722      
650-571 6 SNMTCA11DS1  9740 PACIFIC BELL 722      
650-571 7 SNMTCA11DS1  9740 PACIFIC BELL 722      
650-571 8 SNMTCA11DS1  9740 PACIFIC BELL 722      
650-571 9 SNMTCA11DS1  9740 PACIFIC BELL 722      
650-572 A SNMTCA11DS1  9740 PACIFIC BELL 722      
650-573 A SNMTCA11DS1  9740 PACIFIC BELL 722      
650-574 A SNMTCA11DS1  9740 PACIFIC BELL 722      
650-574 0 SNMTCA11DS1  9740 PACIFIC BELL 722      
650-574 1 SNMTCA11DS1  9740 PACIFIC BELL 722      
650-574 2 SNMTCA11DS1  9740 PACIFIC BELL 722      
650-574 3 SNMTCA11DS1  9740 PACIFIC BELL 722      
650-574 4 SNMTCA11DS1  9740 PACIFIC BELL 722      
650-574 5 SNMTCA11DS1  9740 PACIFIC BELL 722      
650-574 6 SNMTCA11DS1  9740 PACIFIC BELL 722      
650-574 7 SNMTCA11DS1  9740 PACIFIC BELL 722      

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

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

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.