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: 240 [Rate centres in NPA 240] [Dial plan for NPA 240]

NXX: 903

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
240-903 A Indian Head MD ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236      
240-903 0 Indian Head MD WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2014-05-30   
240-903 1 Indian Head MD WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2014-05-30   
240-903 2 Indian Head MD ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236   2014-01-17   
240-903 3 Indian Head MD ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236   2014-01-27   
240-903 4 Indian Head MD WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2015-01-22   
240-903 5 Indian Head MD WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2015-01-22   
240-903 6 Indian Head MD VINNVACBDS0  876D ONVOY, LLC - MD 236   2015-06-27   
240-903 7 Indian Head MD WASIDCRG7MD  508J CENTURYLINK COMMUNICATIONS, LLC 236   2014-06-25   
240-903 8 Indian Head MD WASHDCINDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2015-09-02   
240-903 9 Indian Head MD VINNVACBDS0  876D ONVOY, LLC - MD 236   2015-10-09   

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.