Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 279 [Rate centres in NPA 279] [Dial plan for NPA 279]

NXX: 290

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
279-290 A Elk Grove CA   6529 T-MOBILE USA, INC. 726   2025-12-26   
279-290 0 Elk Grove CA   6010 NEW CINGULAR WIRELESS PCS, LLC 726   2026-02-17   
279-290 1 Elk Grove CA   6010 NEW CINGULAR WIRELESS PCS, LLC 726   2026-02-17   
279-290 4 Elk Grove CA   7145 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 726   2026-05-07   
279-290 5 Elk Grove CA   6529 T-MOBILE USA, INC. 726   2025-12-26   
279-290 6 Elk Grove CA   6529 T-MOBILE USA, INC. 726   2025-12-26   
279-290 7 Elk Grove CA   6529 T-MOBILE USA, INC. 726   2025-12-26   
279-290 8 Elk Grove CA   6529 T-MOBILE USA, INC. 726   2025-12-26   
279-290 9 Elk Grove CA   6529 T-MOBILE USA, INC. 726   2025-12-26   

Last updated: Sat, 02 May 2026 12:20:53 UTC

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