Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

NPA: 475 [Rate centres in NPA 475] [Dial plan for NPA 475]

NXX: 354

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
475-354 A Waterbury CT   639C ONVOY, LLC - CT 920   2024-03-29   
475-354 0 Waterbury CT   639C ONVOY, LLC - CT 920   2024-03-29   
475-354 1 Waterbury CT   639C ONVOY, LLC - CT 920   2024-03-29   
475-354 2 Waterbury CT   639C ONVOY, LLC - CT 920   2024-03-29   
475-354 3 Waterbury CT   639C ONVOY, LLC - CT 920   2024-03-29   
475-354 4 Waterbury CT   639C ONVOY, LLC - CT 920   2024-03-29   
475-354 5 Waterbury CT   639C ONVOY, LLC - CT 920   2024-03-29   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.