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.

OCN: 318J COMCAST IP PHONE, LLC

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 >>

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
301-378 A Frederick MD   240      
301-378 0 Frederick MD   240   2007-04-06   
301-378 2 Frederick MD   240   2009-08-13   
301-378 8 Frederick MD   240   2012-11-03   
301-378 9 Frederick MD   240   2013-05-12   
301-447 4 Emmitsburg MD   240   2007-04-07   
301-463 8 Lonaconing MD   240   2014-03-24   
301-508 7 Myersville MD   240   2007-04-07   
301-508 8 Myersville MD   240   2019-05-10   
301-682 2 Frederick MD   240   2015-02-27   
301-703 1 Mount Airy MD   240   2015-09-17   
301-703 5 Mount Airy MD   240   2012-05-26   
301-703 8 Mount Airy MD   240   2007-04-07   
301-732 4 Frederick MD   240   2015-08-11   
301-732 5 Frederick MD   240   2011-12-04   
301-732 6 Frederick MD   240   2013-09-18   
301-750 5 Friendsville MD   240   2007-08-31   
301-786 8 McCoole MD   240   2014-03-24   
301-798 2 Damascus (Hagerstown LATA) MD   240   2010-06-26   
301-798 3 Damascus (Hagerstown LATA) MD   240   2016-02-17   
301-798 8 Damascus (Hagerstown LATA) MD   240   2014-06-06   
301-799 1 Keedysville MD   240   2011-01-22   
301-810 2 Buckeystown MD   240   2016-12-09   
301-810 5 Buckeystown MD   240   2007-04-07   
301-824 0 Smithsburg MD   240   2007-04-07   
301-835 7 Frederick MD   240   2019-03-20   
301-842 5 Clear Spring MD   240   2009-12-31   
301-882 4 New Market MD   240   2013-08-16   
301-882 7 New Market MD   240   2007-04-07   
301-895 8 Grantsville MD   240   2010-03-05   
301-898 2 Frederick MD   240   2008-08-20   
301-969 A Brunswick MD   240      
301-969 0 Brunswick MD   240   2007-04-20   
301-969 6 Brunswick MD   240   2014-08-20   
304-212 5 Morgantown WV   256   2011-03-30   
304-213 A Worthington WV   256      
304-224 1 Weirton WV   256   2005-05-30   
304-238 9 Wheeling Zone 1 WV   256   2016-08-22   
304-241 1 Morgantown WV   256   2010-06-26   
304-241 4 Morgantown WV   256   2008-07-02   
304-241 5 Morgantown WV   256   2008-12-14   
304-278 8 Rivesville WV   256   2008-02-20   
304-322 2 Morgantown WV   256   2014-03-12   
304-322 4 Morgantown WV   256   2016-05-16   
304-336 3 Wheeling Zone 2 WV   256   2006-08-09   
304-350 1 Martinsburg WV   240   2013-04-26   
304-350 8 Martinsburg WV   240   2013-12-28   
304-355 3 Piedmont (Mineral) WV   240   2014-03-23   
304-381 2 Morgantown WV   256   2007-09-12   
304-381 4 Morgantown WV   256   2012-06-02   

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 >>

Last updated: Sat, 11 Jul 2020 20:37:26 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.