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: 690

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
240-690 A Gaithersburg MD WASHDCDTDS1  7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
240-690 0 Gaithersburg MD WASHDC127MD  073H TELNYX LLC 236   2017-03-14   
240-690 1 Gaithersburg MD BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2017-01-25   
240-690 2 Gaithersburg MD VINNVACBDS0  876D ONVOY, LLC - MD 236   2018-06-14   
240-690 3 Gaithersburg MD WASHDCDTDS1  7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2017-01-09   
240-690 4 Gaithersburg MD ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236   2017-03-10   
240-690 5 Gaithersburg MD VINNVACBDS0  876D ONVOY, LLC - MD 236   2017-12-15   
240-690 6 Gaithersburg MD VINNVACBDS0  876D ONVOY, LLC - MD 236   2017-12-15   
240-690 7 Gaithersburg MD WASHDCINDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2019-05-27   
240-690 8 Gaithersburg MD WASHDC12DS6  568G PEERLESS NETWORK OF MARYLAND, LLC 236   2019-08-28   
240-690 9 Gaithersburg MD WASHDC125MD  197D VONAGE AMERICA LLC 236   2018-12-24   

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

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