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.

Switch: CHICCACWCM1

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
530-991 A Oroville CA 6010 NEW CINGULAR WIRELESS PCS, LLC 724   2025-01-12   
530-991 3 Oroville CA 6010 NEW CINGULAR WIRELESS PCS, LLC 724   2025-01-12   
530-991 4 Oroville CA 6010 NEW CINGULAR WIRELESS PCS, LLC 724   2025-01-12   
530-991 5 Oroville CA 6010 NEW CINGULAR WIRELESS PCS, LLC 724   2025-01-12   
530-991 6 Oroville CA 6010 NEW CINGULAR WIRELESS PCS, LLC 724   2025-01-12   
530-991 7 Oroville CA 6010 NEW CINGULAR WIRELESS PCS, LLC 724   2025-01-12   
530-991 8 Oroville CA 6010 NEW CINGULAR WIRELESS PCS, LLC 724   2025-01-12   
530-991 9 Oroville CA 6010 NEW CINGULAR WIRELESS PCS, LLC 724   2025-01-12   

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Last updated: Thu, 16 Jul 2026 02:21:55 UTC

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