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: 599

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
435-599 A St George UT SLKCUT26BMD  965H FRACTEL, LLC 660      
435-599 0 St George UT SLKDUTBTAMD  6571 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 660   2021-11-22   
435-599 1 St George UT SLKDUTBTAMD  6571 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 660   2021-11-22   
435-599 2 St George UT SLKDUTBTAMD  6571 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 660   2021-11-22   
435-599 3 St George UT SLKDUTBTAMD  6571 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 660   2021-11-22   
435-599 4 St George UT SLKDUTBTAMD  6571 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 660   2021-11-22   
435-599 5 St George UT SLKCUT267MD  939H COMMIO, LLC 660   2021-12-16   
435-599 6 St George UT SLKCUT267MD  939H COMMIO, LLC 660   2021-12-16   
435-599 7 St George UT SLKDUTYI3MD  3231 LEVEL 3 COMMUNICATIONS, LLC - UT 660   2022-05-05   
435-599 8 St George UT SLKDUTBTAMD  6571 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 660   2021-11-22   
435-599 9 St George UT SLKCUT26BMD  965H FRACTEL, LLC 660   2021-10-11   

Last updated: Sun, 17 May 2026 03:26:51 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.