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

NXX: 410

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
551-410 A Ridgewood NJ NWRKNJMDDSK  637C ONVOY, LLC - NJ 224   2024-12-30   
551-410 0 Ridgewood NJ NWRKNJMDDSK  637C ONVOY, LLC - NJ 224   2024-12-30   
551-410 1 Ridgewood NJ NWRKNJMDDSK  637C ONVOY, LLC - NJ 224   2024-12-30   

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

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