Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 310 [Rate centres in NPA 310] [Dial plan for NPA 310]

NXX: 561

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
310-561 A Torrance CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730      
310-561 0 Torrance CA   6010 NEW CINGULAR WIRELESS PCS, LLC 730   2005-04-18   
310-561 1 Torrance CA   649C ONVOY, LLC - CA 730   2005-04-18   
310-561 2 Torrance CA   6010 NEW CINGULAR WIRELESS PCS, LLC 730   2005-04-18   
310-561 3 Torrance CA   6010 NEW CINGULAR WIRELESS PCS, LLC 730   2005-04-18   
310-561 4 Torrance CA   6010 NEW CINGULAR WIRELESS PCS, LLC 730   2005-04-18   
310-561 5 Torrance CA   6010 NEW CINGULAR WIRELESS PCS, LLC 730   2005-04-18   
310-561 6 Torrance CA   6010 NEW CINGULAR WIRELESS PCS, LLC 730   2005-04-18   
310-561 7 Torrance CA   6529 T-MOBILE USA, INC. 730   2005-05-23   
310-561 8 Torrance CA   8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730   2005-04-18   
310-561 9 Torrance CA   6529 T-MOBILE USA, INC. 730   2005-04-15   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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