Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Switch: BTHLILBORS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
618-377 A Bethalto IL 9329 ILLINOIS BELL TEL CO 520      

Last updated: Sun, 01 Jun 2025 02:18:11 UTC

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