Area Code 970
Colorado
Area code 970 serves Colorado, primarily Fort Collins, in the Mountain Time (MT) time zone. It has served the region since 02-Apr-1995.
Overlay Area Code
This area code is part of an overlay region, meaning the same geographic area is served by multiple area codes. Overlay codes were introduced to meet growing demand for phone numbers without requiring existing customers to change their numbers.
This area code shares its geographic region with: area code 748 (Fort Collins).
In service since: 02-Apr-1995
Demographics
The estimated population served by area code 970 is approximately 1,755,829. The population density is 12 people per square mile, which is lower than the national average of 94. The median household income is $91,364, which is higher than the national median of $78,538. Approximately 40.3% of adults hold a bachelor's degree or higher, compared to the national rate of 35.0%. This rate is higher than the national average. The poverty rate stands at 10.5%, which is lower than the national rate of 12.4%.
History
Area code 970 was established in 1995 as a geographic area code. It shares its territory with area code area code 748.
Demographics & Economics
- Total Population
- 1,755,829
- Population Density
- 12 people/sq mibelow U.S. average (U.S.: 94 people/sq mi)
- Median Household Income
- $91,364above U.S. median (U.S.: $78,538)
- Poverty Rate
- 10.5%below U.S. average (U.S.: 12.4%)
- Unemployment Rate
- 4.3%below U.S. average (U.S.: 5.2%)
- Education Attainment
- Bachelor's Degree+40.3%above U.S. average (U.S.: 35.0%)High School or Lower26.1%
Statistics are population-weighted aggregations from Census ACS 5-year estimates.See Sources for details.
Geographic Coverage
State
CO
Major Cities
- Fort Collins
- Greeley
- Loveland
- Grand Junction
- Windsor
- Evans
- Montrose
- Clifton
- Durango
- Johnstown
- Firestone
- Fruita
- Steamboat Springs
- Sterling
- Berthoud
- Wellington
- Fort Morgan
- Rifle
- Edwards
- Glenwood Springs
- Severance
- Delta
- Craig
- Cortez
and 160 more cities
Time Zone
- Mountain Time (MT)
Current Time
County Coverage
Population-weighted county share based on aggregated ZCTA population (100% = total mapped population for area code 970).
| County | Population | Share |
|---|---|---|
| Larimer, CO | 417,047 | 23.8% |
| Weld, CO | 367,869 | 21.0% |
| Mesa, CO | 164,638 | 9.4% |
| Garfield, CO | 78,632 | 4.5% |
| Eagle, CO | 70,072 | 4.0% |
| Montrose, CO | 61,030 | 3.5% |
| La Plata, CO | 60,981 | 3.5% |
| Routt, CO | 37,314 | 2.1% |
| Pitkin, CO | 37,043 | 2.1% |
| Gunnison, CO | 33,117 | 1.9% |
| Delta, CO | 32,014 | 1.8% |
| Summit, CO | 31,624 | 1.8% |
| Morgan, CO | 30,829 | 1.8% |
| San Juan, CO | 30,518 | 1.7% |
| Archuleta, CO | 27,885 | 1.6% |
| Montezuma, CO | 26,229 | 1.5% |
| Grand, CO | 24,279 | 1.4% |
| Rio Blanco, CO | 22,892 | 1.3% |
| Logan, CO | 22,540 | 1.3% |
| Adams, CO | 20,016 | 1.1% |
| Washington, CO | 17,184 | 1.0% |
| Boulder, CO | 16,997 | 1.0% |
| Moffat, CO | 16,840 | 1.0% |
| Ouray, CO | 16,356 | 0.9% |
| Yuma, CO | 14,740 | 0.8% |
| Hinsdale, CO | 13,768 | 0.8% |
| Mineral, CO | 12,923 | 0.7% |
| San Miguel, CO | 11,870 | 0.7% |
| Saguache, CO | 11,197 | 0.6% |
| Dolores, CO | 7,804 | 0.4% |
| San Juan, NM | 5,662 | 0.3% |
| Phillips, CO | 4,805 | 0.3% |
| Sedgwick, CO | 3,825 | 0.2% |
| San Juan, UT | 1,639 | 0.1% |
| Deuel, NE | 1,541 | 0.1% |
| Jackson, CO | 1,422 | 0.1% |
| Kit Carson, CO | 629 | 0.0% |
| Albany, WY | 58 | 0.0% |
Call Context
This area code spans a mix of urban centers and rural communities across CO, with Fort Collins as a primary city.
Nearby Area Codes
Area codes geographically closest to 970.
Other Area Codes in Colorado
Area codes that also serve Colorado, linked for easy comparison.
Frequently Asked Questions
Common questions about area code 970 and how phone numbering works.
Phone numbers assigned to area code 970 are tied to where they were originally provisioned — not the caller's current location. This code serving roughly 1756k people covers Fort Collins in CO, so a number originally set up there will retain the 970 prefix even if the owner moves or uses VoIP. Mobile phones keep their original number when users relocate, and businesses often adopt local area codes to establish a regional presence.
Start by looking up the area code on this site to understand its geographic context — area code 970 is associated with Fort Collins in CO. For caller-specific details, use your carrier's caller ID features or check public directories. If you suspect fraud, you can report it to the FTC. To file a complaint about robocalls or spoofed numbers, visit the FCC Consumer Complaint Center. You can also register with the National Do Not Call Registry.
When an area's available number pool runs low, regulators introduce an "overlay" code covering the same territory. Both codes coexist, and new numbers are assigned from whichever has availability. Area code 970 serves the Fort Collins region in CO, where growing demand for phone numbers necessitated an additional code. This area code shares its region with area code 748. Learn more in our overlay vs split guide.