Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 630 [Rate centres in NPA 630] [Dial plan for NPA 630]

NXX: 944

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
630-944 A Downers Grove IL EGVGILIFDS1  7196 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 358      

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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