Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 551 [Rate centres in NPA 551] [Dial plan for NPA 551]

NXX: 439

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
551-439 A Hackensack NJ   637C ONVOY, LLC - NJ 224   2026-10-03   
551-439 0 Hackensack NJ   637C ONVOY, LLC - NJ 224   2026-10-03   
551-439 1 Hackensack NJ   637C ONVOY, LLC - NJ 224   2026-10-03   
551-439 2 Hackensack NJ   637C ONVOY, LLC - NJ 224   2026-10-03   
551-439 3 Hackensack NJ   637C ONVOY, LLC - NJ 224   2026-10-03   

Last updated: Tue, 01 Sep 2026 00:40:05 UTC

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