Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 240 [Rate centres in NPA 240] [Dial plan for NPA 240]

NXX: 575

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
240-575 A Frederick MD FRDRMDFRXMD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 240      
240-575 0 Frederick MD FRDRMDFRKMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 240   2007-06-16   
240-575 1 Frederick MD FRDRMDFRXMD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 240   2007-07-03   
240-575 2 Frederick MD FRDRMDFRXMD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 240   2007-07-27   
240-575 3 Frederick MD FRDRMDFRXMD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 240   2007-07-27   
240-575 4 Frederick MD FRDRMDFRXSX  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 240   2008-04-04   
240-575 5 Frederick MD FRDRMDFRXMD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 240   2006-02-20   
240-575 6 Frederick MD FRDRMDFRXMD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 240   2006-02-20   
240-575 7 Frederick MD FRDRMDFRPMD  2589 US LEC OF MARYLAND, INC. 240   2008-04-20   
240-575 8 Frederick MD MNRVMDMOXFX  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 240   2007-08-20   
240-575 9 Frederick MD FRDRMDFRXTX  318J COMCAST IP PHONE, LLC 240   2008-03-19   

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

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