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: 357

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
475-357 A Milford CT HRFRCTBCDS1  639C ONVOY, LLC - CT 920   2024-04-04   
475-357 0 Milford CT HRFRCTBCDS1  639C ONVOY, LLC - CT 920   2024-04-04   
475-357 1 Milford CT HRFRCTBCDS1  639C ONVOY, LLC - CT 920   2024-04-04   
475-357 2 Milford CT HRFRCTBCDS1  639C ONVOY, LLC - CT 920   2024-04-04   
475-357 3 Milford CT HRFRCTBCDS1  639C ONVOY, LLC - CT 920   2024-04-04   
475-357 4 Milford CT SMFRCTPU4MD  4800 LEVEL 3 COMMUNICATIONS, LLC - CT 920   2025-01-23   
475-357 8 Milford CT   639C ONVOY, LLC - CT 920   2025-04-06   

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

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