Local Calling Guide

Area code/prefix search

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

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
989-389 A St Helen MI 9323 AMERITECH MICHIGAN 344      

Last updated: Sun, 04 Apr 2021 19:28:27 UTC

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