Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 959 [Rate centres in NPA 959] [Dial plan for NPA 959]

NXX: 678

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
959-678 A Killingworth CT NWHNCT02XOX  7421 AT&T - LOCAL 920      
959-678 0 Killingworth CT   515J IP HORIZON LLC 920   2024-07-15   
959-678 9 Killingworth CT   7421 AT&T - LOCAL 920   2022-08-21   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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