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]

NXX: 691

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
623-691 A Phoenix AZ PHNXAZMYDS0  9636 QWEST CORPORATION 666      
623-691 0 Phoenix AZ PHNXAZMYDS0  9636 QWEST CORPORATION 666      
623-691 1 Phoenix AZ PHNXAZMYDS0  9636 QWEST CORPORATION 666      
623-691 2 Phoenix AZ PHNXAZMYDS0  9636 QWEST CORPORATION 666      
623-691 3 Phoenix AZ PHNXAZMYDS0  9636 QWEST CORPORATION 666      
623-691 4 Phoenix AZ PHNXAZMYDS0  9636 QWEST CORPORATION 666      
623-691 5 Phoenix AZ PHNXAZMYDS0  9636 QWEST CORPORATION 666      
623-691 6 Phoenix AZ BCKYAZMADS0  9636 QWEST CORPORATION 666      
623-691 7 Phoenix AZ PHNZAZZJDS1  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 666   2005-04-24   
623-691 8 Phoenix AZ PHNZAZZJDS1  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 666   2006-08-31   
623-691 9 Phoenix AZ PHNXAZMYDS0  9636 QWEST CORPORATION 666      

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.