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: 566

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
240-566 A Frederick MD FRDRMDFRDS1  9212 VERIZON MARYLAND, INC. 240      
240-566 0 Frederick MD FRDRMDFRDS1  9212 VERIZON MARYLAND, INC. 240   2002-07-26   
240-566 1 Frederick MD FRDRMDFRPMD  2589 US LEC OF MARYLAND, INC. 240   2006-02-10   
240-566 2 Frederick MD MNRVMDMOXFX  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 240   2006-09-01   
240-566 3 Frederick MD FRDRMDFRXMD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 240   2002-10-01   
240-566 4 Frederick MD FRDRMDFRXMD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 240   2002-10-01   
240-566 5 Frederick MD FRDRMDFRXMD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 240   2006-09-05   
240-566 6 Frederick MD FRDRMDFRXSX  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 240   2008-06-05   
240-566 7 Frederick MD MRBGWVBUHPA  4095 FIBERNET, LLC - WV 240   2008-09-01   
240-566 8 Frederick MD FRDRMDFRKMD  5562 METROPCS, INC. 240   2006-06-02   
240-566 9 Frederick MD FRDRMDFRDS1  9212 VERIZON MARYLAND, INC. 240   2002-07-26   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

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