Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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OCN: 7056 XO ILLINOIS, INC.

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
312-284 A Chicago Zone 01-Franklin IL CHCGILTCDS4  358      
312-284 0 Chicago Zone 01-Franklin IL CHCGILTCDS4  358      
312-284 1 Chicago Zone 01-Franklin IL CHCGILTCDS4  358      
312-284 2 Chicago Zone 01-Franklin IL CHCGILTCDS4  358      
312-284 3 Chicago Zone 01-Franklin IL CHCGILTCDS4  358      
312-284 4 Chicago Zone 01-Franklin IL CHCGILTCDS4  358      
312-284 5 Chicago Zone 01-Franklin IL CHCGILTCDS4  358      
312-284 6 Chicago Zone 01-Franklin IL CHCGILTCDS4  358      
312-284 8 Chicago Zone 01-Franklin IL CHCGILTCDS4  358      

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

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