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.

NPA: 350 [Rate centres in NPA 350] [Dial plan for NPA 350]

NXX: 221

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
350-221 A Lodi CA SKTNCA01XFY  649C ONVOY, LLC - CA 738   2024-07-05   
350-221 0 Lodi CA   649C ONVOY, LLC - CA 738   2024-07-05   
350-221 1 Lodi CA   649C ONVOY, LLC - CA 738   2024-07-27   
350-221 2 Lodi CA   649C ONVOY, LLC - CA 738   2025-09-06   
350-221 3 Lodi CA   649C ONVOY, LLC - CA 738   2024-12-02   
350-221 4 Lodi CA   8826 LEVEL 3 COMMUNICATIONS, LLC - CA 738   2024-07-12   
350-221 5 Lodi CA   6010 NEW CINGULAR WIRELESS PCS, LLC 738   2024-09-28   
350-221 6 Lodi CA   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 738   2024-09-14   
350-221 7 Lodi CA   6010 NEW CINGULAR WIRELESS PCS, LLC 738   2025-06-14   
350-221 8 Lodi CA   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 738   2024-11-12   
350-221 9 Lodi CA   6529 T-MOBILE USA, INC. 738   2024-07-07   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.