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: 201

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
623-201 A Phoenix AZ PHNZAZZJDS1  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 666      
623-201 0 Phoenix AZ PHNXAZMACM6  6010 NEW CINGULAR WIRELESS PCS, LLC 666   2009-03-13   
623-201 1 Phoenix AZ PHNZAZZJDS1  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 666   2008-09-19   
623-201 2 Phoenix AZ PHNZAZZJDS1  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 666   2008-09-19   
623-201 3 Phoenix AZ PHNXAZMAXMY  4360 GLOBAL CROSSING LOCAL SERVICES, INC. - AZ 666   2008-11-15   
623-201 4 Phoenix AZ PHNXAZMAXMY  4360 GLOBAL CROSSING LOCAL SERVICES, INC. - AZ 666   2008-11-15   
623-201 5 Phoenix AZ PHNXAZMAXMY  4360 GLOBAL CROSSING LOCAL SERVICES, INC. - AZ 666   2008-11-15   
623-201 6 Phoenix AZ PHNXAZMAXMY  4360 GLOBAL CROSSING LOCAL SERVICES, INC. - AZ 666   2008-11-15   
623-201 7 Phoenix AZ PHNXAZMAXMY  4360 GLOBAL CROSSING LOCAL SERVICES, INC. - AZ 666   2008-11-15   
623-201 8 Phoenix AZ PHNDAZ91DS5  3285 LEVEL 3 COMMUNICATIONS, LLC - AZ 666   2008-11-15   
623-201 9 Phoenix AZ TEMPAZNR5MD  6529 T-MOBILE USA, INC. 666   2008-12-07   

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

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.