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.

Oakland, MD

<< 1 2

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
301-859 7 CMLDMDCMEMD  876D ONVOY, LLC - MD 240   2020-01-06   
301-859 8 MNRVMDMOXFX  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 240   2009-10-29   
301-859 9   2593 CORE COMMUNICATIONS, INC.- MD 240   2019-05-02   
301-914 A THVLMDTV0MD  676A MOUNTAIN COMMUNICATIONS, LLC DBA PROCOM - MD 240      
301-914 0   2593 CORE COMMUNICATIONS, INC.- MD 240   2018-10-22   
301-914 1 THVLMDTV0MD  676A MOUNTAIN COMMUNICATIONS, LLC DBA PROCOM - MD 240   2013-02-17   
301-914 2   2593 CORE COMMUNICATIONS, INC.- MD 240   2018-10-22   
301-914 3   2593 CORE COMMUNICATIONS, INC.- MD 240   2018-10-22   
301-914 4   2593 CORE COMMUNICATIONS, INC.- MD 240   2018-10-22   
301-914 5   2593 CORE COMMUNICATIONS, INC.- MD 240   2018-10-22   
301-914 6   2593 CORE COMMUNICATIONS, INC.- MD 240   2018-10-22   
301-914 7   2593 CORE COMMUNICATIONS, INC.- MD 240   2018-10-22   
301-914 8   2593 CORE COMMUNICATIONS, INC.- MD 240   2018-10-22   
301-914 9   2593 CORE COMMUNICATIONS, INC.- MD 240   2018-10-22   

<< 1 2

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

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.