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: 667 [Rate centres in NPA 667] [Dial plan for NPA 667]

NXX: 230

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
667-230 A Centreville MD SLBRMD90DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 242      
667-230 0 Centreville MD SLBRMD90DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 242      
667-230 1 Centreville MD SLBRMDSBXVX  876D ONVOY, LLC - MD 242      
667-230 2 Centreville MD SLBRMDSBXVX  876D ONVOY, LLC - MD 242      
667-230 3 Centreville MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242      
667-230 4 Centreville MD SLBRMD90DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 242      
667-230 5 Centreville MD SLBRMD90DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 242      
667-230 6 Centreville MD   2593 CORE COMMUNICATIONS, INC.- MD 242      
667-230 7 Centreville MD   2593 CORE COMMUNICATIONS, INC.- MD 242      
667-230 8 Centreville MD SLBRMDSBXVX  876D ONVOY, LLC - MD 242      
667-230 9 Centreville MD SLBRMDSBXVX  876D ONVOY, LLC - MD 242      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.