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: 544

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
240-544 A Washington Zone 14 MD TYCRVA03AMD  2589 US LEC OF MARYLAND, INC. 236      
240-544 0 Washington Zone 14 MD TYCRVA03AMD  2589 US LEC OF MARYLAND, INC. 236      
240-544 1 Washington Zone 14 MD TYCRVA03AMD  2589 US LEC OF MARYLAND, INC. 236      
240-544 2 Washington Zone 14 MD TYCRVA03AMD  2589 US LEC OF MARYLAND, INC. 236      
240-544 3 Washington Zone 14 MD TYCRVA03AMD  2589 US LEC OF MARYLAND, INC. 236      
240-544 4 Washington Zone 14 MD LARLMDCCDS0  4492 VDL, INC. DBA GLOBAL TELECOM BROKERS - MD 236   2004-04-06   
240-544 5 Washington Zone 14 MD TYCRVA03AMD  2589 US LEC OF MARYLAND, INC. 236      
240-544 6 Washington Zone 14 MD WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2015-05-14   
240-544 7 Washington Zone 14 MD WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2015-05-14   
240-544 8 Washington Zone 14 MD BTVLMD12CM9  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2014-02-09   
240-544 9 Washington Zone 14 MD   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-10-23   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.