Pick 720 if you want a newer Denver code.
720 was laid over the 303 area in 1998, so it covers Denver, Aurora and Lakewood like 303 does.
Colorado has six area codes: 303, 719, 970, 720, 983 and 748.
Area codes in Colorado
Get a phone number with the right area code for Colorado.
303 and 720 are the Denver codes, 719 is Colorado Springs and Pueblo, and 970 covers the north and west, from Fort Collins to Grand Junction and Durango.
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Colorado has six area codes.
In the order they opened.
- 303Since 1947Denver and Boulder
2,219 FCC complaints
Get a 303 number - 719Since 1988Colorado Springs and Pueblo
238 FCC complaints
Get a 719 number - 970Since 1995Northern and western Colorado
362 FCC complaints
Get a 970 number - 720Since 1998Denver
316 FCC complaints
Get a 720 number - 983Since 2022No page yet
33 FCC complaints
- 748Since 2025No page yet
748
The newest area code in Colorado is 748.
748 entered service in 2025, laid over the 970 area in northern and western Colorado. 983, from 2022, was laid over 303.
Pick 303 for Denver, 719 for Colorado Springs or 970 for Fort Collins and the west.
Pick 719 for Colorado Springs, Pueblo or Trinidad.
719 was split from 303 in 1988, and it reaches Alamosa and Leadville as well as Pueblo.
Pick 970 for Fort Collins, Grand Junction or Durango.
970 covers northern and western Colorado, with Greeley and Loveland among its towns.
People filed 3,168 FCC complaints about unwanted calls from Colorado area codes in 12 months.
From October 2025 to September 2026, 3,168 unwanted-call complaints filed with the FCC gave a caller ID number that started with one of the Colorado codes. 303 was named most, on 2,219 of them (70%).
- 3,168unwanted-call complaints named a Colorado code
- 303was named on the most of them, 2,219
- 70%of the Colorado complaints named 303
Source: Federal Communications Commission, CGB - Consumer Complaints Data (dataset 3xyp-aqkj), issue "Unwanted Calls", read on November 4, 2026. Caller ID can be faked, so a code shows what appeared on the phone, not where the caller was.
This is how you get a Colorado number.
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Start your free week.
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- 2
Type the code you picked.
Open Create a number, type the three digits and give the number a name.
- 3
Hand the number out.
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People ask these questions about Colorado area codes.
More in the full FAQ.
303 and 720 both cover Boulder and Longmont, along with Denver, Aurora and Lakewood.
It was split from 303 in 1988. Before that, 303 was the only code in Colorado.
Colorado has six area codes in service, by the numbering administrator's report of October 23, 2026: 303, 719, 970, 720, 983 and 748. They are listed in the order they opened, from 1947 to 2025.
The newest area code in Colorado is 748, in service since 2025. 748 entered service in 2025, laid over the 970 area in northern and western Colorado. 983, from 2022, was laid over 303.
From October 2025 to September 2026, people filed 3,168 FCC complaints about unwanted calls from numbers that start with a Colorado code. The codes named were 303 (2,219), 970 (362), 720 (316), 719 (238) and 983 (33). A complaint is one person's report. Caller ID can be faked, so a code shows what appeared on the phone, not where the caller was.
Yes. You type the area code you want when you create a number, and you do not need to live in Colorado. Calls ring the phone you already have, and texts land in your ExpressNumber inbox.
No. Your numbers are receive-only: they take calls and texts, and they never make them. You answer calls on your own phone, and you cannot reply to a text from the inbox.
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Cities in Colorado
States next to Colorado
More area codes
Every fact on this page comes from public numbering records.
The codes, the places and the years are rows of the North American Numbering Plan Administrator's area code database (its report of October 23, 2026), and the complaints are the FCC's own.
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