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: 972 [Rate centres in NPA 972] [Dial plan for NPA 972]

NXX: 737

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
972-737 A Allen TX DLLSTXJFDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 552      
972-737 0 Allen TX   903C ONVOY, LLC - TX 552   2015-05-11   
972-737 1 Allen TX   903C ONVOY, LLC - TX 552   2015-06-13   
972-737 2 Allen TX   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 552   2015-05-10   
972-737 3 Allen TX   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 552   2015-01-17   
972-737 4 Allen TX   903C ONVOY, LLC - TX 552   2016-03-03   
972-737 5 Allen TX   903C ONVOY, LLC - TX 552   2016-03-03   
972-737 6 Allen TX   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 552   2016-11-09   
972-737 7 Allen TX   903C ONVOY, LLC - TX 552   2016-01-14   
972-737 8 Allen TX   997G LOCAL ACCESS LLC - TX 552   2016-03-28   
972-737 9 Allen TX   903C ONVOY, LLC - TX 552   2015-06-13   

Last updated: Sun, 04 Apr 2021 19:28:27 UTC

Sponsored by: VoiceMeUp - Corporate VoIP Services

Like this site? We accept donations via PayPal.