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: 221

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
310-221 A San Pedro CA SNPDCA01DS0  9740 PACIFIC BELL 730      
310-221 0 San Pedro CA SNPDCA01DS0  9740 PACIFIC BELL 730      
310-221 1 San Pedro CA RVSDCAYAGT1  6664 SPRINT SPECTRUM, L.P. 730   2004-07-12   
310-221 2 San Pedro CA RVSDCAYAGT1  6664 SPRINT SPECTRUM, L.P. 730   2004-07-12   
310-221 3 San Pedro CA LSANCA03DS7  7139 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 730   2002-04-24   
310-221 4 San Pedro CA SNPDCA01DS0  9740 PACIFIC BELL 730      
310-221 5 San Pedro CA BLFLCA01DS0  8322 MPOWER COMMUNICATIONS CORP. - CA 730   2003-04-11   
310-221 6 San Pedro CA LSANCAJWDS8  7453 US TELEPACIFIC CORP. - CA 730   2008-09-30   
310-221 7 San Pedro CA   624H ONVOY SPECTRUM, LLC 730   2022-04-19   
310-221 8 San Pedro CA LSANCARCD3S  649C ONVOY, LLC - CA 730   2005-09-25   
310-221 9 San Pedro CA LSANCA54DS7  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730   2006-07-06   

Last updated: Wed, 01 Jun 2022 03:09:23 UTC

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