North American Numbers Source-cited · ownership disclosed
Area code
970
In service
United States · since 1995

Fort Collins

Area code 970 serves northern and western Colorado. It split from 303 on April 2, 1995, and gained its first overlay (748) on July 7, 2025.

The essentials Numbering data · NumberResearch · as of 2026-09-18
Place
Fort Collins
Type
geographic
Status
in service
In service since
1995
Projected exhaust
2088 Q4

Status, dates and counts are read from NumberResearch (NANPA / CNAC / FCC records). Assignment records show initial assignees, not the carrier serving a number today.

A · Where it is

Where 970 is

Northern and western Colorado, including the northern Front Range, mountain resorts and the Western Slope..

Communities served wholly or partly by 970:

Fort CollinsGreeleyLovelandGrand JunctionDurangoVailAspenSteamboat SpringsGlenwood Springs
B · Relationships

How it relates to other codes

The codes 970 was split from, spawned, or shares its area with. A split divides the map and changes some numbers; an overlay shares the same ground and changes none — what's the difference?

Split from · 1995 303 Denver Split from 303 to serve northern and western Colorado.
Overlay · 2025 748 Fort Collins (overlay) All-services overlay added over the 970 region.
What's changing. Overlaid — part of the 970/748 northern/western Colorado overlay complex as of 2025; ten-digit dialing mandatory.
C · History

How 970 got here

1995-04-02
Split from 303; 303 retained the Denver metro and 970 took northern/western Colorado.
Source: Wikipedia
2021-10-24
Ten-digit dialing became mandatory ahead of the 988 Lifeline rollout.
Source: Wikipedia
2025-07-07
The 970/748 overlay complex was activated.
Source: Wikipedia
D · Capacity

How full it is

Prefixes assigned
789
Prefixes available
11
Thousands-blocks assigned
3,786

Prefix-assignment counts describe allocation to carriers, not how many individual numbers are in use. Full technical records: NumberResearch ↗.

Compare 970 with another code →
Sources
Wikipedia ↗
Area code 970
NumberResearch.org ↗
Live status, dates, assignment counts and exhaust forecast — data as of 2026-09-18 (CC BY 4.0).

Place, relationships and history above are compiled by North American Numbers from the sources listed and last checked 2026-09-18. A check date is not an expert review — see how this is made. Flag an error.