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: 820 [Rate centres in NPA 820] [Dial plan for NPA 820]

NXX: 300

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
820-300 A Guadalupe CA SNLOCA01XFX  649C ONVOY, LLC - CA 740      
820-300 0 Guadalupe CA SNLOCA01XFX  649C ONVOY, LLC - CA 740   2019-03-01   
820-300 1 Guadalupe CA SNLOCA01XFX  649C ONVOY, LLC - CA 740   2019-03-01   
820-300 2 Guadalupe CA SNLOCA01XFX  649C ONVOY, LLC - CA 740   2019-05-10   
820-300 3 Guadalupe CA SNBBCAXFXIY  965H FRACTEL, LLC 740   2019-06-12   
820-300 4 Guadalupe CA SNLOCA01XFX  649C ONVOY, LLC - CA 740   2020-06-08   
820-300 5 Guadalupe CA SNLOCA01XFX  649C ONVOY, LLC - CA 740   2019-09-15   
820-300 6 Guadalupe CA SNLOCA01XFX  649C ONVOY, LLC - CA 740   2021-03-04   
820-300 7 Guadalupe CA SNLOCA01XFX  649C ONVOY, LLC - CA 740   2021-03-04   
820-300 8 Guadalupe CA SNLOCA01XEY  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 740   2020-03-09   
820-300 9 Guadalupe CA SNLOCA01X4Y  073H TELNYX LLC 740   2021-03-30   

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

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.