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.
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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
805-203 2 Cambria CA 939H COMMIO, LLC 740   2022-11-24   
805-505 A San Luis Obispo CA 939H COMMIO, LLC 740      
805-505 0 San Luis Obispo CA 939H COMMIO, LLC 740   2017-05-18   
805-840 3 Arroyo Grande CA 939H COMMIO, LLC 740   2022-11-10   
805-859 5 Atascadero CA 939H COMMIO, LLC 740   2021-10-22   
805-859 6 Atascadero CA 939H COMMIO, LLC 740   2021-10-22   
805-859 7 Atascadero CA 939H COMMIO, LLC 740   2021-10-22   
805-859 8 Atascadero CA 939H COMMIO, LLC 740   2021-10-22   
805-912 0 Bradley CA 939H COMMIO, LLC 740   2022-12-01   
805-939 8 Nipomo CA 939H COMMIO, LLC 740   2022-03-15   
805-939 9 Nipomo CA 939H COMMIO, LLC 740   2022-03-15   
820-206 0 Paso Robles CA 939H COMMIO, LLC 740   2022-12-01   
820-208 2 Atascadero CA 939H COMMIO, LLC 740   2024-01-29   
820-208 9 Atascadero CA 939H COMMIO, LLC 740   2024-01-29   
820-221 0 Santa Maria CA 939H COMMIO, LLC 740   2024-01-28   
820-221 1 Santa Maria CA 939H COMMIO, LLC 740   2024-01-28   
820-224 0 Nipomo CA 939H COMMIO, LLC 740   2024-03-03   
820-224 1 Nipomo CA 939H COMMIO, LLC 740   2024-03-03   
820-500 6 Gaviota CA 939H COMMIO, LLC 740   2022-02-21   
820-758 3 Santa Barbara CA 939H COMMIO, LLC 740   2021-07-24   
820-758 4 Santa Barbara CA 939H COMMIO, LLC 740   2021-07-24   
820-758 5 Santa Barbara CA 939H COMMIO, LLC 740   2021-07-24   
820-800 2 Cayucos CA 939H COMMIO, LLC 740   2024-01-29   
820-800 5 Cayucos CA 939H COMMIO, LLC 740   2022-02-21   
820-800 9 Cayucos CA 939H COMMIO, LLC 740   2022-02-21   

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

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