Local Calling Guide

Area code/prefix search

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

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
810-385 A Port Huron MI 9323 MICHIGAN BELL TEL CO 340      

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

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