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: 234

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
551-234 A Cliffside NJ WAYNNJAWCMS  5562 METROPCS, INC. 224      
551-234 0 Cliffside NJ   637C ONVOY, LLC - NJ 224   2016-12-18   
551-234 1 Cliffside NJ   6623 OMNIPOINT COMMUNICATIONS, INC. - NJ 224   2017-02-06   
551-234 2 Cliffside NJ   637C ONVOY, LLC - NJ 224   2017-05-11   
551-234 3 Cliffside NJ   637C ONVOY, LLC - NJ 224   2025-04-06   
551-234 4 Cliffside NJ   073H TELNYX LLC 224   2017-03-15   
551-234 5 Cliffside NJ   5562 METROPCS, INC. 224   2017-04-01   
551-234 6 Cliffside NJ   264F PEERLESS NETWORK OF NEW JERSEY, LLC - NJ 224   2018-11-30   
551-234 7 Cliffside NJ   5562 METROPCS, INC. 224   2018-12-27   
551-234 8 Cliffside NJ   5562 METROPCS, INC. 224   2016-11-21   
551-234 9 Cliffside NJ   5562 METROPCS, INC. 224   2016-11-21   

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

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.