Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 450 [Rate centres in NPA 450] [Dial plan for NPA 450]

NXX: 256

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
450-256 A Pont-Viau QC MTRLPQ335MD  4727 ISP TELECOM, INC. 888 805008    

Last updated: Sat, 21 Mar 2026 23:53:39 UTC

Sponsored by: ISP Telecom

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