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: 623 [Rate centres in NPA 623] [Dial plan for NPA 623]

Block: A

<< 1 2 3 4

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
623-972 A Phoenix AZ PHNXAZMRDS0  9636 QWEST CORPORATION 666      
623-974 A Phoenix AZ PHNXAZMRDS0  9636 QWEST CORPORATION 666      
623-975 A Phoenix AZ BRDSAZMADS0  9636 QWEST CORPORATION 666      
623-977 A Phoenix AZ PHNXAZMRDS0  9636 QWEST CORPORATION 666      
623-979 A Phoenix AZ PHNXAZPRDS0  9636 QWEST CORPORATION 666      
623-980 A Phoenix AZ PHNZAZZJAMD  6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 666      
623-986 A Phoenix AZ PHNZAZZJAMD  6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 666      
623-999 A Phoenix AZ PHNXAZ28DS3  630E ONVOY, LLC - AZ 666      

<< 1 2 3 4

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.