970 Area Code — Colorado
970 is a North American Numbering Plan area code for Colorado, the United States. It covers about 1,278,263 people in 197 towns and 235 ZIP codes, including Fort Collins, Greeley and Grand Junction.
| Field | Value |
|---|---|
| Area code | 970 |
| Country | United States (+1) |
| State / province | Colorado |
| Type | Standalone (no other NANP code covers the same towns) |
| Time zone | Mountain |
| Population covered | 1,278,263 |
| Towns covered | 197 |
| ZIP codes | 235 |
| Approx. centre | 39.581, -106.184 |
Where area code 970 is used
Area code 970 is assigned to Colorado, the United States, inside the North American Numbering Plan. Numbers in the code are written (970) NXX-XXXX at home and +1 970 NXX-XXXX when dialled from outside Canada and the United States. Since the NANP moved to 10-digit dialling you must always include the area code, even for a local call.
Towns and cities in area code 970
The 197 towns below are the largest in the 970 footprint, ranked by population. Every one of them links to its own page with the full list of area codes and ZIP codes for that town.
| Town | County | Population | ZIP codes |
|---|---|---|---|
| Fort Collins | Larimer County | 202,303 | 9 |
| Greeley | Weld County | 119,344 | 6 |
| Grand Junction | Mesa County | 113,583 | 7 |
| Loveland | Larimer County | 94,535 | 3 |
| Windsor | Weld County | 46,456 | 2 |
| Durango | La Plata County | 40,010 | 3 |
| Montrose | Montrose County | 36,366 | 3 |
| Evans | Weld County | 20,798 | 1 |
| Johnstown | Weld County | 20,502 | 1 |
| Steamboat Springs | Routt County | 18,525 | 3 |
| Berthoud | Larimer County | 18,271 | 1 |
| Sterling | Logan County | 16,936 | 1 |
Counties covered
| County | ZIP codes |
|---|---|
| Weld County | 31 |
| Larimer County | 24 |
| Mesa County | 18 |
| Eagle County | 11 |
| Gunnison County | 11 |
| Routt County | 10 |
| Montrose County | 9 |
| Grand County | 8 |
| Logan County | 8 |
| Delta County | 8 |
| Garfield County | 8 |
| Morgan County | 7 |
Nearby area codes
How to dial area code 970
- Within North America: 970 + 7-digit number (970-NXX-XXXX). The leading 1 is optional on a mobile phone and required on most landlines for long-distance.
- From abroad: your country's international prefix, then 1, then 970, then the 7-digit number — for example 00 1 970 NXX-XXXX from most of Europe.
Frequently asked questions
What area code is 970?
970 is a North American Numbering Plan area code assigned to Colorado, the United States. It covers about 1,278,263 people in 197 towns.
Is 970 a US or Canadian area code?
970 is a United States area code. Canada and the United States share the +1 country code, so both are part of the same numbering plan.
What time zone is area code 970 in?
Area code 970 is in the Mountain time zone.
Do I have to dial 10 digits?
Yes. Every NANP call now requires the area code plus the seven-digit number, even for a local call.