Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 475 [Rate centres in NPA 475] [Dial plan for NPA 475]

NXX: 406

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
475-406 A Naugatuck CT   6624 OMNIPOINT COMMUNICATIONS, INC. - CT 920   2026-11-07   
475-406 9 Naugatuck CT   6624 OMNIPOINT COMMUNICATIONS, INC. - CT 920   2026-11-07   

Last updated: Tue, 29 Sep 2026 03:00:13 UTC

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