Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 773 [Rate centres in NPA 773] [Dial plan for NPA 773]

NXX: 223

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
773-223 A Chicago Zone 06-Kedzie IL LBRDILGOAMD  6630 USA MOBILITY WIRELESS, INC. 358      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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