Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Switch: DLLSTXRNDS0

Remotes:

Switch Switch name Switch type
RCSNTXBZRS0  RICHARDSON  5ER 

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
972-997 9 Dallas TX 9533 SOUTHWESTERN BELL 552      

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Last updated: Thu, 05 Feb 2026 23:41:55 UTC

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