Coloradoarea codes

Colorado has 6 area codes, all on Mountain time. Pick one to see where it is and how to call it.

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Area codes
6
Country
United States
Time zone
Mountain
Local time
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Unknown caller

Got a callfrom a Colorado number?

A Colorado area code shows where the number was first assigned, not where the caller is now. People keep their numbers when they move, and scammers often fake local-looking numbers.

  • Don’t know the number? Let it go to voicemail.
  • Says it’s your bank or a government office? Hang up and call the number on their website or your card.
  • Never share codes, passwords or card details with a caller.
  • Report scam calls to the FTC.

Need to call your bank or an office back from abroad? GlobCall calls the official number from your browser for $0.02/min, instead of the $1 or more a minute many carriers charge.

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Calling from abroad

Call Coloradofrom any country.

The number works the same from every country. Only the start changes: + or your exit code, then 1 for the US and Canada.

  • Dial + on a mobile, or your exit code (00 in most countries, 011 from the US and Canada)
  • Dial 1, the country code for the US and Canada
  • Dial the area code and the 7-digit number
Call a 303 number
Good to know

Colorado area codequestions.

Look up another area code
Colorado has 6 area codes: 303, 719, 720, 748, 970 and 983. It uses Mountain time.
Colorado is on Mountain time.
Dial + (or your exit code, such as 00 or 011), then 1, the 3-digit area code and the 7-digit number. For example: +1 303 555 0123. With GlobCall you can call from your browser from $0.02/min.

Call the US or Canada from your browser.

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