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.

Montebello, CA

<< 1 2 3 4 5 6 7 8 9 10 11 12 13

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
323-972 9 TRNECAGB7MD  899D METROPCS NETWORKS, LLC 730      
738-333 A LSANCARCD6S  252F WIDE VOICE, LLC - CA 730   2025-11-30   
738-333 0 LSANCARCD3S  649C ONVOY, LLC - CA 730   2025-12-01   
738-333 1 LSANCARCD3S  649C ONVOY, LLC - CA 730   2025-12-01   
738-333 2 LSANCARCD3S  649C ONVOY, LLC - CA 730   2026-01-05   
738-333 3 LSANCARCD6S  252F WIDE VOICE, LLC - CA 730   2025-11-30   
738-333 4 LSANCARCD6S  252F WIDE VOICE, LLC - CA 730   2025-11-30   
738-333 5 LSANCARCD6S  252F WIDE VOICE, LLC - CA 730   2025-11-30   
738-333 6 LSANCARCD6S  252F WIDE VOICE, LLC - CA 730   2025-11-30   
738-333 7 LSANCARCD6S  252F WIDE VOICE, LLC - CA 730   2025-11-30   
738-333 8 LSANCARCD6S  252F WIDE VOICE, LLC - CA 730   2025-11-30   
738-333 9 LSANCARCD3S  649C ONVOY, LLC - CA 730   2026-01-05   
738-666 A LSANCARCD3S  649C ONVOY, LLC - CA 730   2026-02-17   
738-666 0 LSANCARCD3S  649C ONVOY, LLC - CA 730   2026-02-17   
738-666 1 LSANCARCD3S  649C ONVOY, LLC - CA 730   2026-02-20   
738-666 2 LSANCARCD3S  649C ONVOY, LLC - CA 730   2026-03-26   
738-666 3 LSANCARCD3S  649C ONVOY, LLC - CA 730   2026-03-26   
738-666 4   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2026-10-16   
738-666 5   649C ONVOY, LLC - CA 730   2026-08-30   
738-666 6 LSANCARCD3S  649C ONVOY, LLC - CA 730   2026-02-17   
738-666 7 BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2026-05-22   
738-666 8 BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2026-04-23   
738-666 9 BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2026-03-23   

<< 1 2 3 4 5 6 7 8 9 10 11 12 13

Last updated: Tue, 01 Sep 2026 00:40:05 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.