Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 617 [Rate centres in NPA 617] [Dial plan for NPA 617]

NXX: 844

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
617-844 A Cambridge MA CMBRMAWA0MD  3370 CTC COMMUNICATIONS CORP. - MA 128      

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

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