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: 233

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
623-233 A Phoenix AZ PHNZAZZJAMD  6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 666      
623-233 0 Phoenix AZ PHNXAZ28DS3  630E ONVOY, LLC - AZ 666   2017-12-10   
623-233 1 Phoenix AZ SCDLAZQFGT2  663G RE-INVENT TELECOM, LLC - AZ 666   2017-09-24   
623-233 2 Phoenix AZ PHNXAZMAXQX  587F BANDWIDTH.COM CLEC, LLC - AZ 666   2016-12-22   
623-233 3 Phoenix AZ PHNXAZMAXQX  587F BANDWIDTH.COM CLEC, LLC - AZ 666   2016-12-22   
623-233 4 Phoenix AZ PHNXAZMAXQX  587F BANDWIDTH.COM CLEC, LLC - AZ 666   2016-12-22   
623-233 5 Phoenix AZ PHNXAZMAX1Z  318J COMCAST IP PHONE, LLC 666   2017-02-01   
623-233 6 Phoenix AZ PHNXAZMAX1Z  318J COMCAST IP PHONE, LLC 666   2017-02-01   
623-233 7 Phoenix AZ PHNXAZUI8MD  508J CENTURYLINK COMMUNICATIONS, LLC 666   2017-02-05   
623-233 8 Phoenix AZ PHNZAZZJDS1  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 666   2017-03-03   
623-233 9 Phoenix AZ TEMPAZNR7MD  5562 METROPCS, INC. 666   2017-06-01   

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.