720 Area Code: Location, Time Zone, and Is It in the USA?

If you have received a phone call or text message from a number beginning with 720, you may be wondering where the number comes from. The 720 area code is associated with Denver, Colorado, and surrounding communities in the United States.

People often search for the 720 area code to find its location, identify the time zone, learn which cities use it, and determine whether an unfamiliar call is legitimate. This guide covers the essential details about the 720 area code.

What Is the 720 Area Code?

The 720 area code is a telephone area code in the state of Colorado, USA. It serves Denver and nearby communities in the Denver metropolitan area.

Area code 720 was introduced on June 1, 1998, to provide additional telephone numbers for a region originally served by area code 303. It is an overlay code, meaning it covers the same geographic area as another area code rather than creating a separate region.

Today, area codes 303, 720, and 983 serve the Denver area. Phone numbers beginning with 720 can be assigned to individuals, businesses, mobile phones, and landlines.

Where Is the 720 Area Code Located?

The 720 area code is located in central Colorado, in the United States. Its main city is Denver, the state capital and one of Colorado’s largest urban centres.

The coverage area includes Denver and nearby communities along Colorado’s Front Range. The region is known for its business districts, residential neighbourhoods, universities, and access to the Rocky Mountains.

A 720 phone number is associated with this Colorado calling region. However, the area code does not guarantee that the caller is physically located in Denver because people can keep their numbers when they move, and caller ID can be spoofed.

Is 720 Area Code in the USA?

Yes. The 720 area code is in the United States and belongs to Colorado.

It is not an international or toll-free code. It is a geographic area code used for phone numbers in the Denver metropolitan region.

The country calling code for the United States is +1. If you receive a call displayed as +1 720 XXX XXXX, the number is formatted as a US phone number associated with the Denver, Colorado, area.

Keep in mind that a displayed number can be spoofed. If you do not recognize a caller, verify their identity before sharing personal or financial information.

Cities Covered by the 720 Area Code

The 720 area code serves Denver and several nearby communities in Colorado. Major cities and communities associated with the region include:

• Denver
• Aurora
• Boulder
• Lakewood
• Thornton
• Arvada
• Westminster
• Centennial
• Commerce City
• Longmont

The exact availability of numbers varies by telephone exchange and location. Because 720 is an overlay of 303 and 983, people living in the same area can have different area codes.

Nearby communities may also use other Colorado area codes depending on their location and telephone-number assignments.

720 Area Code Time Zone

The 720 area code follows the Mountain Time Zone because it serves the Denver area in Colorado.

The region observes daylight saving time, so the UTC offset changes during the year:

• Mountain Standard Time (MST): UTC−7 during standard time.
• Mountain Daylight Time (MDT): UTC−6 during daylight saving time.

If you are calling a person or business with a 720 number from another state or country, check the current time in Denver before calling. The local time may differ from yours.

History of the 720 Area Code

Area code 720 entered service on June 1, 1998. It was introduced as an overlay for area code 303 to help meet growing demand for telephone numbers in the Denver metropolitan area.

An overlay allows multiple area codes to serve the same geographic region. Existing customers can keep their numbers, while new phone numbers may be assigned a different area code.

Area code 983 was later introduced as another overlay for the Denver region, entering service on June 17, 2022. As a result, area codes 303, 720, and 983 now serve the same general calling area.

Ten-digit dialing is used for local calls in this region.

How to Call a 720 Number

Calling a 720 number is straightforward. The dialing format depends on where you are calling from.

Within the United States: Dial the ten-digit phone number, including the 720 area code.

Example: 720-XXX-XXXX

From outside the United States: Use the international dialing prefix followed by the US country code, +1, and the ten-digit number.

Example: +1 720 XXX XXXX

International calling charges may apply, depending on your carrier and phone plan. Check your provider’s rates before making an international call.

Is a 720 Number Safe or a Scam?

A 720 number is not automatically a scam. It is a legitimate area code serving Denver and surrounding communities in Colorado.

However, scammers can use real-looking local numbers or manipulate caller ID to make a call appear to come from a familiar area. Therefore, the area code alone cannot establish whether a call or text is trustworthy.

If you receive an unexpected call or text from a 720 number:

• Do not share passwords, one-time verification codes, or banking details.
• Be cautious of urgent requests for money or threats about your accounts.
• Avoid clicking suspicious links in text messages.
• Verify business or government claims using an official website or published phone number.
• Let unfamiliar calls go to voicemail if you are unsure whether to answer.

You can search the complete number online to see whether other people have reported it. Treat online reports as helpful clues, not conclusive proof of fraud.

720 Area Code Quick Facts

Detail	Information
Area code	720
Country	United States
State	Colorado
Main city	Denver
Region	Denver metropolitan area
Time zone	Mountain Time
Standard-time offset	UTC−7
Daylight-time offset	UTC−6
In-service date	June 1, 1998
Overlay area codes	303 and 983
Toll-free number?	No

Conclusion

The 720 area code is located in Denver, Colorado, USA, and serves surrounding communities in the Denver metropolitan area. It entered service in 1998 and shares its coverage region with area codes 303 and 983.

The area code follows Mountain Time, observing both standard time and daylight saving time. If you receive a call from a 720 number, the prefix can help identify its geographic association, but it does not prove the caller’s identity or current location. Always verify unfamiliar callers before sharing sensitive information.