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: 650 [Rate centres in NPA 650] [Dial plan for NPA 650]

NXX: 570

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
650-570 A San Mateo CA SNMTCA11DS1  9740 PACIFIC BELL 722      
650-570 0 San Mateo CA SNMTCA11DS1  9740 PACIFIC BELL 722      
650-570 1 San Mateo CA SNFCCAMKX1X  9262 UTILITY TELECOM GROUP, LLC - CA 722      
650-570 2 San Mateo CA SNMTCA11DS1  9740 PACIFIC BELL 722      
650-570 3 San Mateo CA SNMTCA11DS1  9740 PACIFIC BELL 722      
650-570 4 San Mateo CA SNMTCA11DS1  9740 PACIFIC BELL 722      
650-570 5 San Mateo CA SNMTCA11DS1  9740 PACIFIC BELL 722      
650-570 6 San Mateo CA SNMTCA11DS1  9740 PACIFIC BELL 722      
650-570 7 San Mateo CA SNMTCA11DS1  9740 PACIFIC BELL 722      
650-570 8 San Mateo CA SNFCCAMKX1X  9262 UTILITY TELECOM GROUP, LLC - CA 722      
650-570 9 San Mateo CA SNFCCAMKX1X  9262 UTILITY TELECOM GROUP, LLC - CA 722      

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

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.