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: 221

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
435-221 A Beaver UT SLKDUTBTAMD  6571 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 660      
435-221 0 Beaver UT SLKDUTBTAMD  6571 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 660      
435-221 4 Beaver UT SLKCUTMAXHY  624H ONVOY SPECTRUM, LLC 660   2024-10-15   
435-221 6 Beaver UT SLKCUT26DS1  526H PEERLESS NETWORK OF UTAH, LLC - UT 660   2024-03-18   
435-221 8 Beaver UT SLKCUTMAXHY  624H ONVOY SPECTRUM, LLC 660   2024-10-15   

Last updated: Sun, 01 Jun 2025 02:18:11 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.