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: 423 [Rate centres in NPA 423] [Dial plan for NPA 423]

NXX: 370

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
423-370 A Athens TN KNVLTNMA49Z  525E ONVOY, LLC - TN 474      
423-370 0 Athens TN KNVLTNMA49Z  525E ONVOY, LLC - TN 474   2019-05-24   
423-370 1 Athens TN KNVLTNMA49Z  525E ONVOY, LLC - TN 474      
423-370 2 Athens TN KNVLTNMA48Z  7476 POWERTEL NASHVILLE LICENSES, INC. DBA T-MOBILE USA 474   2018-10-11   
423-370 3 Athens TN KNVLTNMA48Z  7476 POWERTEL NASHVILLE LICENSES, INC. DBA T-MOBILE USA 474   2018-10-11   
423-370 4 Athens TN KNVLTNMA48Z  7476 POWERTEL NASHVILLE LICENSES, INC. DBA T-MOBILE USA 474   2018-10-11   
423-370 5 Athens TN KNVLTNMA49Z  525E ONVOY, LLC - TN 474   2021-07-11   
423-370 6 Athens TN KNVLTNMA48Z  7476 POWERTEL NASHVILLE LICENSES, INC. DBA T-MOBILE USA 474   2018-10-11   
423-370 7 Athens TN KNVLTNMA48Z  7476 POWERTEL NASHVILLE LICENSES, INC. DBA T-MOBILE USA 474   2018-10-11   
423-370 8 Athens TN KNVLTNMA48Z  7476 POWERTEL NASHVILLE LICENSES, INC. DBA T-MOBILE USA 474   2018-10-11   
423-370 9 Athens TN KNVLTNMA49Z  525E ONVOY, LLC - TN 474   2021-07-11   

Last updated: Tue, 15 Nov 2022 00:10:00 UTC

Sponsored by: VoiceMeUp - Corporate VoIP Services

Like this site? We accept donations via PayPal.