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: 739

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
240-739 A Frederick MD CMLDMDCMWMD  515J IP HORIZON LLC 240      
240-739 0 Frederick MD FRDRMDFRXSX  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 240      
240-739 1 Frederick MD   515J IP HORIZON LLC 240      
240-739 2 Frederick MD FRDRMDFRXSX  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 240      
240-739 3 Frederick MD FRDRMDFRXTX  318J COMCAST IP PHONE, LLC 240      
240-739 4 Frederick MD FRDRMDFR9MD  5562 METROPCS, INC. 240      
240-739 5 Frederick MD CMLDMDCM2MD  836G SHENTEL COMMUNICATIONS, LLC. - MD 240      
240-739 6 Frederick MD CMLDMDCMEMD  876D ONVOY, LLC - MD 240      
240-739 7 Frederick MD CMLDMDCMEMD  876D ONVOY, LLC - MD 240      
240-739 8 Frederick MD FRDRMDFRKMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 240      
240-739 9 Frederick MD FRDRMDFRKMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 240      

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

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.