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: 216

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
350-216 A Modesto CA SKTNCACZ4MD  939H COMMIO, LLC 738   2024-02-24   
350-216 0 Modesto CA   939H COMMIO, LLC 738   2024-02-24   
350-216 1 Modesto CA   939H COMMIO, LLC 738   2024-02-24   
350-216 2 Modesto CA   939H COMMIO, LLC 738   2024-02-24   
350-216 3 Modesto CA   939H COMMIO, LLC 738   2024-02-24   
350-216 4 Modesto CA   6010 NEW CINGULAR WIRELESS PCS, LLC 738   2025-04-05   
350-216 5 Modesto CA   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 738   2024-04-04   
350-216 6 Modesto CA   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 738   2024-05-06   
350-216 7 Modesto CA   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 738   2024-06-11   
350-216 8 Modesto CA   649C ONVOY, LLC - CA 738   2024-03-24   
350-216 9 Modesto CA   649C ONVOY, LLC - CA 738   2024-04-04   

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

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.