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: 842

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
240-842 A Washington Zone 14 (Baltimore LATA) MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
240-842 0 Washington Zone 14 (Baltimore LATA) MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
240-842 1 Washington Zone 14 (Baltimore LATA) MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
240-842 2 Washington Zone 14 (Baltimore LATA) MD   2593 CORE COMMUNICATIONS, INC.- MD 238      
240-842 3 Washington Zone 14 (Baltimore LATA) MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
240-842 4 Washington Zone 14 (Baltimore LATA) MD   2593 CORE COMMUNICATIONS, INC.- MD 238      
240-842 5 Washington Zone 14 (Baltimore LATA) MD   2593 CORE COMMUNICATIONS, INC.- MD 238      
240-842 6 Washington Zone 14 (Baltimore LATA) MD CLMAMDJTBMD  2589 US LEC OF MARYLAND, INC. 238      
240-842 7 Washington Zone 14 (Baltimore LATA) MD   2593 CORE COMMUNICATIONS, INC.- MD 238      
240-842 8 Washington Zone 14 (Baltimore LATA) MD BLTMMDCHX7X  073H TELNYX LLC 238      
240-842 9 Washington Zone 14 (Baltimore LATA) MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      

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

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.