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: 340

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
631-340 A Babylon NY NYCMNY30BMD  6630 USA MOBILITY WIRELESS, INC. 132      

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

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