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: 644

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
650-644 A Palo Alto CA SNTDCAUJCM9  6010 NEW CINGULAR WIRELESS PCS, LLC 722      
650-644 0 Palo Alto CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722      
650-644 1 Palo Alto CA SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722      
650-644 2 Palo Alto CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722      
650-644 3 Palo Alto CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722      
650-644 4 Palo Alto CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722      
650-644 5 Palo Alto CA SNTDCAUJCM9  6010 NEW CINGULAR WIRELESS PCS, LLC 722      
650-644 6 Palo Alto CA SNTDCAUJCM9  6010 NEW CINGULAR WIRELESS PCS, LLC 722      
650-644 7 Palo Alto CA SNTDCAUJCM9  6010 NEW CINGULAR WIRELESS PCS, LLC 722      
650-644 8 Palo Alto CA SNTDCAUJCM9  6010 NEW CINGULAR WIRELESS PCS, LLC 722      
650-644 9 Palo Alto CA SNTDCAUJCM9  6010 NEW CINGULAR WIRELESS PCS, LLC 722      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.