New Plymouth Idaho Area Codes
2 area codes cover New Plymouth: 208 and 986. A number carrying any of them is local to New Plymouth.
The codes covering New Plymouth
| 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 New Plymouth, which is why local calls there are dialled as ten digits.
Scope the codes matched to New Plymouth. Source geoinfo-dataset (full_dataset) ZIP→NPA (2018 snapshot) and LocalCallingGuide NPA list (2026-07 NPA list). Updated . Overlay relationships come from the numbering-plan authority; the place match is computed.
Which part of town has which code
We do not publish which of these codes covers which street or neighbourhood in New Plymouth, and we would rather say so than guess. Area codes are drawn around telephone rate centres, which follow neither municipal boundaries nor ZIP codes, and the per-ZIP telephone data we hold is a 2018 snapshot too noisy to split a city with. Where these codes overlay one another the question has no answer at all: they cover the same ground by design. Awaiting a current, clean-rights rate-centre boundary source.
ZIP codes for the same city
Postal geography is organised separately from telephone geography, so New Plymouth’s 1 ZIP code do not map onto the codes above. They are listed in full, with the county each falls in, on the postal side of the site.