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: 731 [Rate centres in NPA 731] [Dial plan for NPA 731]

NXX: 237

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
731-237 A Greenfield TN MMPHTNMA38Z  525E ONVOY, LLC - TN 468      
731-237 0 Greenfield TN MMPHTNMA38Z  525E ONVOY, LLC - TN 468   2019-02-17   
731-237 1 Greenfield TN MMPHTNMA94Z  073H TELNYX LLC 468   2019-06-02   
731-237 9 Greenfield TN MMPHTNMA38Z  525E ONVOY, LLC - TN 468   2019-02-17   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.