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   252F WIDE VOICE, LLC - CA 730   2025-11-30   
738-333 0   649C ONVOY, LLC - CA 730   2025-12-01   
738-333 1   649C ONVOY, LLC - CA 730   2025-12-01   
738-333 3   252F WIDE VOICE, LLC - CA 730   2025-11-30   
738-333 4   252F WIDE VOICE, LLC - CA 730   2025-11-30   
738-333 5   252F WIDE VOICE, LLC - CA 730   2025-11-30   
738-333 6   252F WIDE VOICE, LLC - CA 730   2025-11-30   
738-333 7   252F WIDE VOICE, LLC - CA 730   2025-11-30   
738-333 8   252F WIDE VOICE, LLC - CA 730   2025-11-30   

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

Last updated: Sun, 07 Dec 2025 22:02:11 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.