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: 310

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
551-310 A Westwood NJ JRCYNJ658MD  197D VONAGE AMERICA LLC 224      
551-310 0 Westwood NJ   197D VONAGE AMERICA LLC 224   2020-08-22   
551-310 1 Westwood NJ   197D VONAGE AMERICA LLC 224   2020-08-22   
551-310 2 Westwood NJ   637C ONVOY, LLC - NJ 224   2020-08-23   
551-310 3 Westwood NJ   637C ONVOY, LLC - NJ 224   2020-08-23   
551-310 4 Westwood NJ   637C ONVOY, LLC - NJ 224   2020-10-24   
551-310 5 Westwood NJ   637C ONVOY, LLC - NJ 224   2020-10-24   
551-310 6 Westwood NJ   118F BANDWIDTH.COM CLEC, LLC - NJ 224   2020-11-21   
551-310 7 Westwood NJ   4804 LEVEL 3 COMMUNICATIONS, LLC - NJ 224   2024-08-19   
551-310 8 Westwood NJ   118F BANDWIDTH.COM CLEC, LLC - NJ 224   2020-11-21   
551-310 9 Westwood NJ   118F BANDWIDTH.COM CLEC, LLC - NJ 224   2020-09-12   

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

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