Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 631 [Rate centres in NPA 631] [Dial plan for NPA 631]

NXX: 840

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
631-840 A Islip NY   4006 LEVEL 3 COMMUNICATIONS, LLC - NY 132      
631-840 0 Islip NY NYCMNYBXDSL  384C ONVOY, LLC- NY 132   2016-04-08   
631-840 1 Islip NY   384C ONVOY, LLC- NY 132      
631-840 2 Islip NY   515J IP HORIZON LLC 132   2015-03-25   
631-840 3 Islip NY   4006 LEVEL 3 COMMUNICATIONS, LLC - NY 132      
631-840 4 Islip NY NYCMNYZRYMD  508J CENTURYLINK COMMUNICATIONS, LLC 132   2014-05-01   
631-840 5 Islip NY   7126 CABLEVISION LIGHTPATH, INC. - NY 132      
631-840 6 Islip NY NYCMNYBXDSL  384C ONVOY, LLC- NY 132   2016-04-08   
631-840 7 Islip NY SYOSNYGNCM1  5562 METROPCS, INC. 132   2005-05-27   
631-840 8 Islip NY NYCMNYBXDSL  384C ONVOY, LLC- NY 132   2012-04-08   
631-840 9 Islip NY NYCMNYBXJMD  073H TELNYX LLC 132   2017-05-16   

Last updated: Sun, 27 Apr 2025 12:48:38 UTC

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