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: 607

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
240-607 A Waldorf MD WASJDCDCDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 236      
240-607 0 Waldorf MD   145J TERRA NOVA TELECOM INC. 236      
240-607 1 Waldorf MD TYCRVA03AMD  2589 US LEC OF MARYLAND, INC. 236      
240-607 2 Waldorf MD ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236      
240-607 3 Waldorf MD WASJDCDCDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 236      
240-607 4 Waldorf MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-607 5 Waldorf MD MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
240-607 6 Waldorf MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
240-607 7 Waldorf MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
240-607 8 Waldorf MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
240-607 9 Waldorf MD ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236      

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

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.