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: 391

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
551-391 A Teaneck NJ NWRKNJMDDSK  637C ONVOY, LLC - NJ 224   2024-04-29   
551-391 0 Teaneck NJ NWRKNJMDDSK  637C ONVOY, LLC - NJ 224   2024-04-29   
551-391 1 Teaneck NJ NWRKNJMDDSK  637C ONVOY, LLC - NJ 224   2024-10-04   
551-391 8 Teaneck NJ NWRKNJMDDSK  637C ONVOY, LLC - NJ 224   2024-12-14   
551-391 9 Teaneck NJ NWRKNJMDDSK  637C ONVOY, LLC - NJ 224   2024-11-07   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.