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: 644

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
475-644 A Georgetown CT HRFRCT03XSX  516J TON80 COMMUNICATIONS, LLC 920      
475-644 2 Georgetown CT HRFRCT03XSX  516J TON80 COMMUNICATIONS, LLC 920   2022-04-01   
475-644 4 Georgetown CT HRFRCT0389Z  490J BOOST SUBSCRIBERCO L.L.C. 920   2023-05-22   

Last updated: Tue, 31 Mar 2026 13:56:49 UTC

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