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: 881

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
631-881 A Central Islip NY BRWDNYBW6KD  7421 AT&T - LOCAL 132      
631-881 0 Central Islip NY   829J PAETEC ITEL, LLC 132   2005-06-29   
631-881 1 Central Islip NY   321J HD CARRIER LLC 132   2014-08-01   
631-881 3 Central Islip NY   534J UCOMTEL INC. 132   2021-03-08   
631-881 4 Central Islip NY   4006 LEVEL 3 COMMUNICATIONS, LLC - NY 132   2004-01-14   
631-881 5 Central Islip NY   4006 LEVEL 3 COMMUNICATIONS, LLC - NY 132   2005-07-18   
631-881 6 Central Islip NY   7421 AT&T - LOCAL 132      
631-881 7 Central Islip NY   829J PAETEC ITEL, LLC 132   2005-06-29   
631-881 8 Central Islip NY   155E PEERLESS NETWORK OF NEW YORK, LLC - NY 132   2005-04-08   
631-881 9 Central Islip NY   829J PAETEC ITEL, LLC 132   2005-06-29   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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