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: 307

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
623-307 A Phoenix AZ PHNXAZ28X6X  710A ALLO COMMUNICATIONS, LLC - NE 666      
623-307 0 Phoenix AZ PHNXAZ28DS3  630E ONVOY, LLC - AZ 666   2023-06-26   
623-307 1 Phoenix AZ PHNXAZ28X6X  710A ALLO COMMUNICATIONS, LLC - NE 666   2023-06-18   
623-307 2 Phoenix AZ PHNXAZMAXQY  624H ONVOY SPECTRUM, LLC 666   2023-07-12   
623-307 3 Phoenix AZ PHNZAZZJAMD  6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 666   2023-11-21   
623-307 4 Phoenix AZ PHNXAZ28DS3  630E ONVOY, LLC - AZ 666   2023-06-26   
623-307 5 Phoenix AZ PHNXAZ28DS3  630E ONVOY, LLC - AZ 666   2023-06-26   
623-307 6 Phoenix AZ PHNXAZ28DS3  630E ONVOY, LLC - AZ 666   2023-06-26   
623-307 7 Phoenix AZ PHNXAZ28DS3  630E ONVOY, LLC - AZ 666   2023-06-26   
623-307 8 Phoenix AZ PHNXAZ28DS3  630E ONVOY, LLC - AZ 666   2023-06-26   
623-307 9 Phoenix AZ PHNXAZ28DS3  630E ONVOY, LLC - AZ 666   2023-06-26   

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

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.