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.

Ellicott City, MD

<< 1 2 3

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
667-371 7 BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238      
667-371 8 BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
667-371 9 BLTMMDCHFMD  5562 METROPCS, INC. 238      
667-479 A   876D ONVOY, LLC - MD 238   2024-05-12   
667-479 0   876D ONVOY, LLC - MD 238      
667-479 1   876D ONVOY, LLC - MD 238      
667-686 A BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC.- MD 238      
667-686 0   2593 CORE COMMUNICATIONS, INC.- MD 238      
667-686 1   2593 CORE COMMUNICATIONS, INC.- MD 238      
667-686 2   2593 CORE COMMUNICATIONS, INC.- MD 238      
667-686 3   2593 CORE COMMUNICATIONS, INC.- MD 238      
667-686 4   2593 CORE COMMUNICATIONS, INC.- MD 238      
667-686 5   2593 CORE COMMUNICATIONS, INC.- MD 238      
667-686 6 BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238      
667-686 7 CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
667-686 8 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
667-686 9 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      

<< 1 2 3

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

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.