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.

Switch: RCSNTXHVBMD

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
972-803 3 Dallas TX 516C AT&T CORP. 552   2010-09-14   
972-803 4 Dallas TX 516C AT&T CORP. 552   2010-06-01   
972-803 5 Dallas TX 516C AT&T CORP. 552   2010-03-02   
972-803 6 Dallas TX 516C AT&T CORP. 552   2010-03-02   
972-803 8 Dallas TX 516C AT&T CORP. 552   2010-08-05   
972-850 9 Dallas TX 516C AT&T CORP. 552   2011-03-21   
972-854 6 Grand Prairie TX 516C AT&T CORP. 552   2010-07-12   
972-863 3 Dallas TX 516C AT&T CORP. 552   2009-11-13   
972-863 7 Dallas TX 516C AT&T CORP. 552   2009-06-25   
972-863 8 Dallas TX 516C AT&T CORP. 552   2009-12-29   
972-863 9 Dallas TX 516C AT&T CORP. 552   2009-12-29   
972-876 4 Ennis EMS TX 516C AT&T CORP. 552   2010-11-29   
972-913 4 Dallas TX 516C AT&T CORP. 552   2011-03-21   
972-920 5 De Soto TX 516C AT&T CORP. 552   2011-03-03   
972-954 7 Allen TX 516C AT&T CORP. 552   2006-06-30   

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Last updated: Tue, 01 Sep 2026 00:40:05 UTC

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