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Colorado · Mountain Time

720 Area Code: Denver, CO

The 720 area code covers Denver, Aurora, Lakewood and Boulder in Colorado, on Mountain Time. Here is the current local time there, and whether you can legally place a solicitation call to a 720 number right now.

Current local time in the 720 area code

Current local time in the 720 area code

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Can you legally call a 720 number right now?

Checking…

DayLegal calling window in Colorado
Sunday8:00 AM-9:00 PM
Monday8:00 AM-9:00 PM
Tuesday8:00 AM-9:00 PM
Wednesday8:00 AM-9:00 PM
Thursday8:00 AM-9:00 PM
Friday8:00 AM-9:00 PM
Saturday8:00 AM-9:00 PM

Windows shown are the stricter of the federal TCPA/TSR rule (8 a.m.-9 p.m. local) and Colorado's own statute, in the called party's local time. Informational only, not legal advice. Check any number against the full TCPA calling hours calculator.

Area code 720 at a glance

StateColorado
Principal cityDenver
Time zoneMountain Time
Overlay codes303, 983
Weekday calling window8:00 AM-9:00 PM local
CountryUnited States

Cities in the 720 area code

These are the main population centers 720 serves. Smaller towns across the same Colorado region share the code.

  • Denver
  • Aurora
  • Lakewood
  • Boulder

Calling 720 numbers legally

Colorado has no calling-hour statute stricter than federal law, so the TCPA and the FTC's Telemarketing Sales Rule set the window: solicitation calls only between 8 a.m. and 9 p.m. in the called party's local time. Because the rule follows the called party, a 720 number is on Mountain Time regardless of where you dial from.

Ringless voicemail sits under the same rules as a live call, which is why TCPA compliance matters before you drop to a list. To check a whole list rather than one code, the phone number formatter tags every number with its state so you can segment sends by time zone.

Other Colorado area codes

303Denver983Denver719Colorado Springs748Colorado Springs970Fort Collins

Or browse every US area code.

FAQ

720 area code questions

720 is a US telephone area code serving Colorado, on Mountain Time. Its principal city is Denver, and it also covers Aurora, Lakewood and Boulder. It shares the same territory with overlay codes 303 and 983.
Area code 720 is in the state of Colorado. It serves Denver, Aurora, Lakewood and Boulder, and its principal city is Denver.
The 720 area code is on Mountain Time (America/Denver). The panel above shows the current local time there, updated live.
It depends on the local time in Colorado. Colorado has no calling-hour rule stricter than federal law, so the TCPA and the FTC's Telemarketing Sales Rule govern: solicitation calls are permitted only between 8 a.m. and 9 p.m. in the called party's local time. The live verdict above checks the current time against that window for you.
On weekdays, solicitation calls to Colorado numbers are permitted 8:00 AM to 9:00 PM local time. Sunday hours are 8:00 AM to 9:00 PM.
Area code 720 shares its geography with area codes 303 and 983. Overlay codes cover the same towns, which is why ten-digit dialing is required there: a 720 number and a 303 number can sit on the same street.
Not by itself. 720 is a legitimate Colorado area code used by residents and businesses in Denver and Aurora. Scammers do spoof caller ID to show a local area code, because people answer local numbers more often, so treat an unexpected call asking for payment or personal details with suspicion regardless of the prefix.

Reaching Denver at scale?

VoiceDrop delivers ringless voicemails in your own AI-cloned voice and two-way SMS to Colorado lists, with calling-hour and DNC rules enforced automatically so every drop lands inside the legal window.

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