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: 203

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
551-203 A Jersey City NJ NBWKNJ17DS1  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 224      
551-203 0 Jersey City NJ NWRKNJMDDSK  637C ONVOY, LLC - NJ 224   2016-04-29   
551-203 1 Jersey City NJ NWRKNJMDDSK  637C ONVOY, LLC - NJ 224   2016-04-29   
551-203 2 Jersey City NJ NBWKNJ17DS1  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 224   2019-05-25   
551-203 3 Jersey City NJ NBWKNJ17DS1  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 224   2016-04-23   
551-203 4 Jersey City NJ NBWKNJ17DS1  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 224   2016-04-23   
551-203 5 Jersey City NJ NBWKNJ17DS1  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 224   2016-04-23   
551-203 6 Jersey City NJ NBWKNJ17DS1  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 224   2016-04-23   
551-203 7 Jersey City NJ NWRKNJMDDSK  637C ONVOY, LLC - NJ 224   2016-04-29   
551-203 8 Jersey City NJ NWRKNJMDDSK  637C ONVOY, LLC - NJ 224   2023-09-08   
551-203 9 Jersey City NJ NWRKNJMDDSK  637C ONVOY, LLC - NJ 224   2023-09-08   

Last updated: Sun, 07 Dec 2025 22:02:11 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.