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: 320

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
623-320 A Phoenix AZ TEMPAZNR5MD  6529 T-MOBILE USA, INC. 666      
623-320 0 Phoenix AZ PHNAAZGY3MD  073H TELNYX LLC 666      
623-320 1 Phoenix AZ PHNAAZGY3MD  073H TELNYX LLC 666      
623-320 2 Phoenix AZ PHNXAZMAXQY  624H ONVOY SPECTRUM, LLC 666      
623-320 3 Phoenix AZ PHNXAZMAXQY  624H ONVOY SPECTRUM, LLC 666      
623-320 4 Phoenix AZ PHNXAZMAXQY  624H ONVOY SPECTRUM, LLC 666      
623-320 5 Phoenix AZ TEMPAZNR5MD  6529 T-MOBILE USA, INC. 666      
623-320 6 Phoenix AZ TEMPAZNR5MD  6529 T-MOBILE USA, INC. 666      
623-320 7 Phoenix AZ TEMPAZNR5MD  6529 T-MOBILE USA, INC. 666      
623-320 8 Phoenix AZ TEMPAZNR5MD  6529 T-MOBILE USA, INC. 666      
623-320 9 Phoenix AZ TEMPAZNR5MD  6529 T-MOBILE USA, INC. 666      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.