Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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OCN: 7148 TELEPORT COMMUNICATIONS AMERICA, LLC - TX

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NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
972-942 3 Dallas TX FTWOTXEDX1Z  552   2018-05-29   
972-942 6 Dallas TX FTWOTXEDX1Z  552   2018-05-28   
972-942 7 Dallas TX FTWOTXEDX1Z  552   2018-07-16   
972-944 6 Dallas TX FTWOTXEDX1Z  552   2024-03-25   
972-961 5 Rockwall TX FTWOTXEDX1Z  552   2004-05-02   
972-963 4 Frisco TX FTWOTXEDX1Z  552   2002-12-31   
972-966 5 Lewisville TX DLLBTXPVDS0  552   2008-08-18   
972-972 6 Dallas TX FTWOTXEDX1Z  552   2018-01-22   
972-972 7 Dallas TX FTWOTXEDX1Z  552   2018-01-22   
972-987 A Frisco TX DLLBTXPVDS0  552      
972-987 1 Frisco TX DLLBTXPVDS0  552      
972-987 6 Frisco TX DLLBTXPVDS0  552      
972-987 8 Frisco TX DLLBTXPVDS0  552      

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Last updated: Sat, 10 Oct 2026 15:24:20 UTC

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