Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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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   515J IP HORIZON LLC 552   2016-03-28   
972-737 9 Allen TX   903C ONVOY, LLC - TX 552   2015-06-13   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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