Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

NPA: 551 [Rate centres in NPA 551] [Dial plan for NPA 551]

NXX: 336

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
551-336 A Hackensack NJ JRCYNJ65BMD  965H FRACTEL, LLC 224      
551-336 0 Hackensack NJ   515J IP HORIZON LLC 224   2020-05-28   
551-336 1 Hackensack NJ   515J IP HORIZON LLC 224   2020-05-28   
551-336 2 Hackensack NJ NWRKNJMDDSK  637C ONVOY, LLC - NJ 224   2020-10-23   
551-336 3 Hackensack NJ NWRKNJMDDSK  637C ONVOY, LLC - NJ 224   2020-10-23   
551-336 4 Hackensack NJ NWRKNJMDDSK  637C ONVOY, LLC - NJ 224   2021-02-18   
551-336 5 Hackensack NJ NWRKNJMDDSK  637C ONVOY, LLC - NJ 224   2021-02-18   
551-336 6 Hackensack NJ NWRKNJMDDSK  637C ONVOY, LLC - NJ 224   2020-06-21   
551-336 7 Hackensack NJ NWRKNJMDDSK  637C ONVOY, LLC - NJ 224   2020-06-21   
551-336 8 Hackensack NJ JRCYNJ65BMD  965H FRACTEL, LLC 224   2020-04-16   
551-336 9 Hackensack NJ NWRKNJMDDSK  637C ONVOY, LLC - NJ 224   2020-06-21   

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.