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 6 7 8 9 10

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
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 6 7 8 9 10

Last updated: Wed, 04 Mar 2026 03:00:52 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.