Idaho Area Codes

Area codes: 2
ZIP codes: 320
Cities & towns: 266
Counties: 44

Every area code in Idaho

All Idaho area codes, what each primarily serves, and which share ground with another.
Area code	Primarily serves	Shares ground with	In service
208	Boise	986	1947
986	Boise	208	2017

A code in the “shares ground” column is an overlay: it covers the same territory rather than a different part of Idaho, which is why local calls there are dialled as ten digits.

Which codes share the same ground

Idaho has 1 group of codes that overlay one another: the codes inside a group cover the same territory rather than different parts of the state, so local calls there are dialled as ten digits.

208 986

Where Idaho's communities sit

Each point is an Idaho community, plotted from its record coordinates. The outline is the convex envelope of those points — a footprint, not a boundary.

Reference points and footprint
Not an official NANPA boundary
Not a USPS delivery area

Largest Idaho cities and their codes

largest 25

Scope every area code assigned to Idaho. Source LocalCallingGuide NPA list (2026-07 NPA list) and geoinfo-dataset (full_dataset) ZIP→NPA (2018 snapshot). Updated 16 July 2026. Overlay relationships come from the numbering-plan authority; the city match is computed.