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: 435 [Rate centres in NPA 435] [Dial plan for NPA 435]

NXX: 406

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
435-406 A Delta UT SLKDUTBTAMD  6571 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 660      
435-406 0 Delta UT   5727 FIRSTDIGITAL TELECOM, LLC - UT 660   2015-01-05   
435-406 1 Delta UT   6571 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 660      
435-406 2 Delta UT   871E ONVOY, LLC - UT 660   2021-04-14   
435-406 3 Delta UT   871E ONVOY, LLC - UT 660   2018-11-12   
435-406 4 Delta UT   6571 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 660   2006-07-07   
435-406 5 Delta UT   6571 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 660   2012-09-07   
435-406 6 Delta UT   6571 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 660   2007-12-13   
435-406 7 Delta UT   6571 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 660   2011-02-05   
435-406 8 Delta UT   5727 FIRSTDIGITAL TELECOM, LLC - UT 660   2015-01-05   
435-406 9 Delta UT   6571 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 660      

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.