Area code 720 covers Denver and surrounding communities in Colorado.
Updated 8 October 2026
Area code 720 is in Colorado, shown here with Denver marked.
Now in Denver
Mountain Time · UTC−7, UTC−6 in summer
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Mountain Time
Where you are—
Offset—
Callback window
Typical business hours, 9 to 5 Monday to Friday.
Typical business hours, 9 to 5 Monday to Friday, shown as the blue arc. A guide to when a real Denver office is likely to answer. It says nothing about who called you.
Source: North American Numbering Plan Administrator, retrieved 8 October 2026.
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Is area code 720 a scam?
No. Area code 720 is a legitimate area code serving Denver since 1998. Scammers spoof caller ID to display 720 numbers, which is why complaints exist against a code that is itself genuine.
Neighbour spoofing is the reason a local-looking number is not a guarantee. A caller anywhere in the world can display a 720 number, and the number they display may belong to a real business in Denver that has nothing to do with the call.
The callerAnywhere in the worldSets the caller ID their equipment sends.
What is displayed(720) 721-3278May belong to a real Denver business.
Your phoneLooks localA nearby code and prefix make you likelier to answer.
827Area code 720 had 827 different numbers reported for spam calls in the 30 days to 8 October 2026.
42ndArea code 720 ranks 42nd of 331 US geographic area codes by spam complaint volume.
57%Of the 906 complaints about area code 720 in the 30 days to 8 October 2026, 57% were reported as a recorded message or robocall.
10%The most reported subject on area code 720 is reducing your debt (credit cards, mortgage, student loans), appearing in 10% of its complaints in the 30 days to 8 October 2026.
Why am I getting text messages from area code 720?
Texts from 720 numbers follow the same pattern as calls — mostly local businesses and services. Treat any text asking for payment or credentials as suspect regardless of the code.
The common patterns are a wrong-number opener that turns into conversation, an unsolicited job offer, and a crypto or investment tip. Do not reply, do not follow the link, and forward the message to 7726 (SPAM) to report it to your carrier.
Pattern 1Wrong-number openerTurns into conversation.
Pattern 2Unsolicited job offerDo not reply, do not follow the link.
Pattern 3Crypto or investment tipTreat any payment ask as suspect.
Report it7726Forward the message. It spells SPAM on a keypad.
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Area codes that overlay 720
Area code 720 shares its geographic footprint with 2 other codes: 303, 983. Overlays are laid over an existing area rather than splitting it, so all local calls require the full ten-digit number.
Area code 720 arrived in 1998 as an overlay on Denver's original 303, and the two codes now blanket the metro area together with 983. Denver is the capital and largest city of Colorado, with 715,522 residents at the 2020 Census, a metro of about 3.1 million, and a metro GDP of $311.9 billion in 2023. The economy leans white-collar: professional, scientific, and technical services was the largest employment sector in 2024 with about 68,300 workers, and the highest-paying industries were corporate management and oil and gas extraction (Data USA). Aerospace and telecom cluster along the Front Range, with Lockheed Martin, Ball Aerospace, and a dense field of federal agencies and startups drawing on the region's technical workforce.
Who lives in the 720 region
Denver's population is younger and better paid than most of the country. Median age was 35.3 and median household income was $94,718 in 2024 (Data USA). The city is 28% Hispanic, and Mexico is by far the most common origin country for Colorado's foreign-born residents. Spanish is the clear second language of commerce, and a steady stream of arrivals from other states keeps the labor market competitive and the housing market expensive, with a median property value of $616,000 in 2024.
What a 720 number signals to a caller
Because 720 overlays 303 rather than replacing it, a number in area code 720 reads as Denver but newer. Some longtime locals still treat a 303 prefix as the mark of an established operation, though the distinction fades each year. Callers describe Denver business culture as informal and outdoorsy on the surface but prompt underneath: meetings start on time and Mountain time zone math trips up out-of-state callers more than anything else. Ten-digit dialing has been standard here since 1998, longer than almost anywhere in the country, so nobody blinks at it.
Area code 720 serves Denver and surrounding communities in Colorado. It is in the Mountain Time zone.
What state is area code 720 in?
Area code 720 is in Colorado. It is not in Las Vegas or Bowling Green or Portland — those are area codes 702 and 270 and 207.
Is area code 720 toll free?
No. Area code 720 is a geographic area code serving Denver, Colorado. The toll-free codes are 800, 833, 844, 855, 866, 877, 888, and a call to a 720 number is charged at your normal rate.
Why am I getting calls from 720?
Calls displaying a 720 number come from businesses and individuals in the Denver area, and from anywhere at all when caller ID is spoofed to look local. 827 720 numbers were reported to the FTC in the 30 days to 8 October 2026.
How do I block calls from area code 720?
Both iOS and Android can silence calls from unknown numbers, and every major US carrier offers free call-blocking. Blocking the whole of area code 720 is rarely worth it, because spoofed numbers change constantly and you would lose legitimate calls from Denver.