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: 837

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
731-837 A Middleton TN MMPKTNVZ5MD  4806 LEVEL 3 COMMUNICATIONS, LLC - TN 468      
731-837 0 Middleton TN MMPHTNMA71Z  720G TIME WARNER CABLE INFORMATION SVCS (TENNESSEE), TN 468   2023-09-24   
731-837 1 Middleton TN MMPHTNMA38Z  525E ONVOY, LLC - TN 468   2016-06-09   
731-837 2 Middleton TN MMPHTNMA38Z  525E ONVOY, LLC - TN 468   2016-06-09   
731-837 4 Middleton TN MMPHTNMA38Z  525E ONVOY, LLC - TN 468   2021-10-31   
731-837 5 Middleton TN MMPHTNMA81Z  516C AT&T CORP. 468   2011-05-11   
731-837 7 Middleton TN MMPHTNMA82Z  508J CENTURYLINK COMMUNICATIONS, LLC 468   2014-05-02   
731-837 8 Middleton TN MMPHTNMA94Z  073H TELNYX LLC 468   2019-06-02   
731-837 9 Middleton TN MMPHTNMAY4X  624H ONVOY SPECTRUM, LLC 468   2023-06-09   

Last updated: Sun, 27 Apr 2025 12:48:38 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.