NANP area code
435
UTC−7, UTC−6 during daylight saving
- State
- Utah
- Primary city
- Logan
- Time zone
- Mountain
- In service
- 1997
NANP area code
435
UTC−7, UTC−6 during daylight saving
The code reaches 204 communities and 24 counties across Utah.
The area code itself carries no risk signal. 435 is assigned to Logan, Utah, so a call from it is consistent with a real caller in that area — but the digits alone prove nothing, because they can be forged.
Caller ID is set by whoever places the call, not verified by the network. That is why neighbour spoofing works: an operation anywhere in the world can display a number that matches the area code — and often the first three digits after it — of the person being called, so the call looks local. Every community in the 435 territory is a plausible-looking origin for a forged 435 number, which is why one can be made to look like a neighbour to so many people.
If you did not recognise the call: let it go to voicemail — a legitimate caller with real business will leave one. Do not return the call using the number shown; look the organisation up independently and call the number you found. Never confirm personal details, card numbers, or one-time codes to someone who called you, however plausible the number looked.
Codes.zone publishes no complaint counts, risk scores, or caller identities. We hold no data on individual numbers and will not estimate what we cannot source.
Time there now
—
Mountain · UTC−7, UTC−6 during daylight saving
Reasonable callback window
8:00 AM – 9:00 PM
local time in Mountain
Federal rules bar telemarketing calls to a residence outside 8:00 AM–9:00 PM in the called party's own time zone. It is a sensible bound for a personal callback too — and a caller who rang you well outside it was not observing it.
435 is the only area code serving its territory — it has no overlay in the current numbering plan for Utah. Where a region has no overlay, a number's area code still corresponds to a single geographic area.
| City | ZIP codes | County |
|---|---|---|
| Logan | 4 | Cache County |
| Saint George | 4 | Washington County |
| Park City | 3 | Summit County |
| Cedar City | 2 | Iron County |
| Vernal | 2 | Uintah County |
| Altamont | 1 | Duchesne County |
| Alton | 1 | Kane County |
| Altonah | 1 | Duchesne County |
| Aneth | 1 | San Juan County |
| Annabella | 1 | Sevier County |
| Antimony | 1 | Garfield County |
| Aurora | 1 | Sevier County |
| Axtell | 1 | Sanpete County |
| Bear River City | 1 | Box Elder County |
| Beaver | 1 | Beaver County |
| Beryl | 1 | Iron County |
| Bicknell | 1 | Wayne County |
| Blanding | 1 | San Juan County |
| Bluebell | 1 | Duchesne County |
| Bluff | 1 | San Juan County |
184 further communities not listed. All Utah area codes →
Scope every community matched to 435. Source geoinfo-dataset (full_dataset) ZIP→NPA (2018 snapshot), GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated . Coordinates are place reference points, not boundaries.
We do not publish the NXX prefixes inside 435. The assignment of prefixes to rate centres comes from LERG routing data, which is proprietary, and we will not estimate it from postal data — ZIP codes and telephone prefixes do not map onto each other. Awaiting a clean-rights NPA-NXX source.