Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 424 [Rate centres in NPA 424] [Dial plan for NPA 424]

NXX: 540

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
424-540 A San Pedro CA   7139 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 730   2025-02-17   
424-540 0 San Pedro CA   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2025-04-01   
424-540 3 San Pedro CA   373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 730   2025-03-21   
424-540 4 San Pedro CA   624H ONVOY SPECTRUM, LLC 730   2025-04-05   
424-540 5 San Pedro CA   624H ONVOY SPECTRUM, LLC 730   2025-04-05   
424-540 7 San Pedro CA   624H ONVOY SPECTRUM, LLC 730   2025-04-05   
424-540 9 San Pedro CA   649C ONVOY, LLC - CA 730   2025-04-06   

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

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