Local Calling Guide

Area code/prefix search

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NPA: 857 [Rate centres in NPA 857] [Dial plan for NPA 857]

NXX: 881

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
857-881 A Boston MA   193E 8X8, INC. 128   2026-08-27   
857-881 1 Boston MA   193E 8X8, INC. 128   2026-08-27   

Last updated: Sat, 01 Aug 2026 03:19:33 UTC

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