Local Calling Guide

Area code/prefix search

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NPA: 721 [Rate centres in NPA 721] [Dial plan for NPA 721]

NXX: 542

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
721-542 A Philipsburg SM SWCHSFUNKNO  637G ST. MAARTEN TELEPHONE COMPANY, NV 830      

Last updated: Tue, 31 Mar 2026 13:56:49 UTC

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