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: 624

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
972-624 A Frisco EACS TX FRSCTXCODS1  9533 SOUTHWESTERN BELL 552      
972-624 0 Frisco EACS TX   9533 SOUTHWESTERN BELL 552      
972-624 1 Frisco EACS TX   9533 SOUTHWESTERN BELL 552      
972-624 2 Frisco EACS TX   9533 SOUTHWESTERN BELL 552      
972-624 3 Frisco EACS TX   9533 SOUTHWESTERN BELL 552      
972-624 4 Frisco EACS TX   9533 SOUTHWESTERN BELL 552      
972-624 5 Frisco EACS TX   9533 SOUTHWESTERN BELL 552      
972-624 6 Frisco EACS TX   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 552   2006-10-31   
972-624 7 Frisco EACS TX   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 552   2003-09-16   
972-624 8 Frisco EACS TX   9533 SOUTHWESTERN BELL 552      
972-624 9 Frisco EACS TX   6529 T-MOBILE USA, INC. 552   2014-09-01   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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