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: 379

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
551-379 A Cliffside NJ NWRKNJMDDSK  637C ONVOY, LLC - NJ 224      
551-379 0 Cliffside NJ   637C ONVOY, LLC - NJ 224   2024-07-15   
551-379 1 Cliffside NJ   637C ONVOY, LLC - NJ 224   2025-02-02   
551-379 2 Cliffside NJ   637C ONVOY, LLC - NJ 224   2023-11-25   
551-379 3 Cliffside NJ   637C ONVOY, LLC - NJ 224   2025-02-02   
551-379 4 Cliffside NJ   637C ONVOY, LLC - NJ 224   2025-04-06   
551-379 5 Cliffside NJ   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 224   2024-12-23   
551-379 6 Cliffside NJ   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 224   2024-12-23   
551-379 7 Cliffside NJ   637C ONVOY, LLC - NJ 224   2024-12-14   
551-379 8 Cliffside NJ   637C ONVOY, LLC - NJ 224   2024-12-14   
551-379 9 Cliffside NJ   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 224   2024-06-08   

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

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