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 Luis Obispo, CA

<< 1 2 3 4 5

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
805-802 1   515J IP HORIZON LLC 740   2021-01-16   
805-802 2 SNBBCAXFXFY  624H ONVOY SPECTRUM, LLC 740   2024-05-31   
805-802 3 SNBBCAXFXFY  624H ONVOY SPECTRUM, LLC 740   2024-05-31   
805-802 4 SNBBCAXFXFY  624H ONVOY SPECTRUM, LLC 740   2024-05-31   
805-802 5 SNBBCAXFXFY  624H ONVOY SPECTRUM, LLC 740   2024-05-31   
805-802 6 SNBBCAXFXFY  624H ONVOY SPECTRUM, LLC 740   2024-05-31   
805-802 8 SNBBCAXFXFY  624H ONVOY SPECTRUM, LLC 740   2022-02-19   
805-802 9 SNBBCAXFXFY  624H ONVOY SPECTRUM, LLC 740   2022-02-19   
805-806 A SNLOCA01XYX  5562 METROPCS, INC. 740      
805-806 0 SNLOCA01XYX  5562 METROPCS, INC. 740   2010-03-04   
805-806 1 SNLOCA01XYX  5562 METROPCS, INC. 740   2016-03-27   
805-806 2 SNLOCA01XYX  5562 METROPCS, INC. 740   2020-07-13   
805-806 3 SNLOCA01XYX  5562 METROPCS, INC. 740   2020-08-17   
805-806 4 SNLOCA01XYX  5562 METROPCS, INC. 740   2021-12-03   
805-806 5 SNLOCA01XYX  5562 METROPCS, INC. 740   2010-07-03   
805-806 6 SNLOCA01XYX  5562 METROPCS, INC. 740   2021-12-03   
805-806 7 SNLOCA01XYX  6529 T-MOBILE USA, INC. 740   2021-06-18   
805-806 8 SNLOCA01XYX  6529 T-MOBILE USA, INC. 740   2021-06-18   
805-806 9 SNLOCA01XYX  6529 T-MOBILE USA, INC. 740   2021-06-18   
805-810 A SNLOCA01DS2  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 740      
805-810 0 SNLOCA01DS2  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 740   2018-07-19   
805-810 9 SNLOCA01DS2  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 740   2018-07-19   
805-817 A SNLOCA01XFX  649C ONVOY, LLC - CA 740      
805-817 0 SNLOCA01XFX  649C ONVOY, LLC - CA 740   2013-10-15   
805-817 1 SNLOCA01XFX  649C ONVOY, LLC - CA 740   2015-08-03   
805-817 2 SNLOCA01XFX  649C ONVOY, LLC - CA 740   2015-08-03   
805-817 3 SNLOCA01XFX  649C ONVOY, LLC - CA 740   2015-08-03   
805-817 4 SNLOCA01XFX  649C ONVOY, LLC - CA 740   2015-08-03   
805-817 5 SNLOCA01XFX  649C ONVOY, LLC - CA 740   2015-08-03   
805-817 6 SNLOCA01XFX  649C ONVOY, LLC - CA 740   2015-08-03   
805-817 7 SNLOCA01XFX  649C ONVOY, LLC - CA 740   2015-08-03   
805-817 8 SNLOCA01XFX  649C ONVOY, LLC - CA 740   2015-08-03   
805-817 9 SNLOCA01XFX  649C ONVOY, LLC - CA 740   2015-08-03   
805-821 A SNBBCAXFXAY  508J CENTURYLINK COMMUNICATIONS, LLC 740      
805-821 0   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 740   2025-11-01   
805-821 1 SNLOCA01XEY  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 740   2014-08-25   
805-821 6 SNBBCAXFXAY  508J CENTURYLINK COMMUNICATIONS, LLC 740   2016-10-26   
805-821 8   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 740   2025-11-26   
805-858 A SNLOCA01XIY  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 740      
805-858 0 SNLOCA01XEY  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 740   2022-06-02   
805-858 3 SNLOCA01X5X  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 740   2016-09-08   
805-858 8 SNLOCA01XEY  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 740   2013-09-11   
805-858 9 SNLOCA01XIY  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 740   2003-11-16   
805-903 A SNLOCA01XOY  671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 740      
805-903 1 SNLOCA01XOY  671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 740   2006-05-19   
805-903 2 SNLOCA01X1Y  6010 NEW CINGULAR WIRELESS PCS, LLC 740   2008-09-15   
805-903 3 SNLOCA01XEY  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 740   2009-02-24   
805-945 A SNLOCA014MD  9262 UTILITY TELECOM GROUP, LLC - CA 740      
805-945 0 SNLOCA014MD  9262 UTILITY TELECOM GROUP, LLC - CA 740   2017-12-08   
805-945 1 SNLOCA014MD  9262 UTILITY TELECOM GROUP, LLC - CA 740   2017-12-08   
805-945 2 SNLOCA014MD  9262 UTILITY TELECOM GROUP, LLC - CA 740   2017-12-08   
805-945 3 SNLOCA014MD  9262 UTILITY TELECOM GROUP, LLC - CA 740   2017-12-08   
805-945 4 SNLOCA014MD  9262 UTILITY TELECOM GROUP, LLC - CA 740   2017-12-08   
805-945 5 SNLOCA014MD  9262 UTILITY TELECOM GROUP, LLC - CA 740      
805-945 6 SNLOCA014MD  9262 UTILITY TELECOM GROUP, LLC - CA 740      
805-945 7 SNLOCA014MD  9262 UTILITY TELECOM GROUP, LLC - CA 740   2017-12-08   
805-945 8 SNLOCA014MD  9262 UTILITY TELECOM GROUP, LLC - CA 740   2017-12-08   
805-945 9 SNLOCA014MD  9262 UTILITY TELECOM GROUP, LLC - CA 740   2017-12-08   
805-996 A SNLOCA01XCX  981E BANDWIDTH.COM CLEC, LLC - CA 740      
805-996 0 SNLOCA01XCX  981E BANDWIDTH.COM CLEC, LLC - CA 740   2008-07-18   
820-202 A SNLOCA01Y1X  425J CSC WIRELESS, LLC 740      
820-202 0 SNLOCA01XEY  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 740   2023-09-10   
820-202 1 SNLOCA01XEY  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 740   2023-10-16   
820-202 2 SNLOCA01Y1X  425J CSC WIRELESS, LLC 740   2020-04-10   
820-202 8 SNLOCA01X1Y  6010 NEW CINGULAR WIRELESS PCS, LLC 740   2024-12-23   
820-202 9 SNLOCA01X1Y  6010 NEW CINGULAR WIRELESS PCS, LLC 740   2024-12-23   
820-233 A SNBBCAXF9MD  616J LEAP TELECOM, LLC 740   2024-11-22   
820-233 0 SNBBCAXF9MD  616J LEAP TELECOM, LLC 740   2024-11-22   
820-233 9   649C ONVOY, LLC - CA 740   2025-04-06   
820-666 A SNBBCAXFXIY  965H FRACTEL, LLC 740      
820-666 0   649C ONVOY, LLC - CA 740   2025-04-06   
820-666 2 SNBBCAXFXFY  624H ONVOY SPECTRUM, LLC 740   2020-06-29   
820-666 3 SNBBCAXFXFY  624H ONVOY SPECTRUM, LLC 740   2020-06-29   
820-666 4 SNBBCAXFXFY  624H ONVOY SPECTRUM, LLC 740   2020-06-29   
820-666 6 SNBBCAXFXIY  965H FRACTEL, LLC 740   2019-03-23   
820-666 8   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 740   2025-02-13   

<< 1 2 3 4 5

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.