Local Calling Guide

Area code/prefix search

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NPA: 639 [Rate centres in NPA 639] [Dial plan for NPA 639]

NXX: 458

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
639-458 A Alvena SK SKTNSK01BMD  4727 ISP TELECOM, INC. 888 809102    

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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