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.

Atascadero, CA

<< 1 2 3 4

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
820-203 7 SNLOCA01XJX  6529 T-MOBILE USA, INC. 740   2021-05-10   
820-203 8 SNLOCA01XJX  6529 T-MOBILE USA, INC. 740   2021-05-10   
820-203 9 SNLOCA01XJX  6529 T-MOBILE USA, INC. 740   2021-05-10   
820-208 A SNLOCA01XOY  671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 740      
820-208 0 SNLOCA01XFX  649C ONVOY, LLC - CA 740   2023-11-30   
820-208 1 SNLOCA01XFX  649C ONVOY, LLC - CA 740   2023-11-30   
820-208 2   939H COMMIO, LLC 740   2024-01-29   
820-208 3   649C ONVOY, LLC - CA 740   2024-03-09   
820-208 4   6529 T-MOBILE USA, INC. 740   2024-04-25   
820-208 5 SNLOCA01XOY  671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 740   2022-08-15   
820-208 6   6529 T-MOBILE USA, INC. 740   2024-04-25   
820-208 7   6529 T-MOBILE USA, INC. 740   2024-04-25   
820-208 8 SNLOCA01XOY  671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 740   2022-08-15   
820-208 9   939H COMMIO, LLC 740   2024-01-29   
820-217 A SNLOCA01XMY  490J DISH WIRELESS, LLC 740      
820-217 0 SNLOCA01XMY  490J DISH WIRELESS, LLC 740   2023-08-10   
820-217 1 SNLOCA01XEY  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 740   2023-10-16   
820-217 2 SNLOCA01XEY  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 740   2023-12-20   
820-217 3 SNLOCA01XFX  649C ONVOY, LLC - CA 740   2023-11-03   
820-217 4 SNLOCA01XFX  649C ONVOY, LLC - CA 740   2023-11-03   
820-217 5 SNLOCA01XFX  649C ONVOY, LLC - CA 740   2023-11-03   
820-217 6 SNLOCA01XFX  649C ONVOY, LLC - CA 740   2023-11-03   
820-217 7 SNLOCA01XFX  649C ONVOY, LLC - CA 740   2023-11-03   
820-217 8 SNLOCA01XJX  6529 T-MOBILE USA, INC. 740   2023-09-22   
820-217 9 SNLOCA01XJX  6529 T-MOBILE USA, INC. 740   2023-09-22   
820-786 A SNBBCAXFXIY  965H FRACTEL, LLC 740      
820-786 0 SNLOCA01XCX  981E BANDWIDTH.COM CLEC, LLC - CA 740   2021-10-28   
820-786 1 SNLOCA01XCX  981E BANDWIDTH.COM CLEC, LLC - CA 740   2021-10-28   
820-786 2 SNBBCAXFXFY  624H ONVOY SPECTRUM, LLC 740   2021-12-15   
820-786 3 SNBBCAXFXFY  624H ONVOY SPECTRUM, LLC 740   2021-12-15   
820-786 4 SNLOCA01XFX  649C ONVOY, LLC - CA 740   2022-11-28   
820-786 5 SNLOCA01XJX  6529 T-MOBILE USA, INC. 740   2023-01-23   
820-786 6 SNLOCA01XJX  6529 T-MOBILE USA, INC. 740   2023-01-23   
820-786 7 SNBBCAXFXIY  965H FRACTEL, LLC 740   2021-10-08   
820-786 8 SNLOCA01XEY  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 740   2022-07-16   
820-786 9 SNLOCA01XJX  6529 T-MOBILE USA, INC. 740   2023-06-07   

<< 1 2 3 4

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

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.