The Ultimate Guide to the 720 Area Code
| Country | US |
| State | Colorado |
| Major City | Denver |
| Major County | Denver County |
| Time Zone | Mountain Time(MT) |
| Standard Time | UTC/GMT -7:00 hours |
| Daylight Saving Time | UTC/GMT -6:00 hours |
| ZIP Code | 80001-80203 |
What is Area Code 720?
720 is the telephone area code in the North American Numbering Plan (NANP), established in 1998 to serve the Denver metropolitan area in Colorado. It is an essential tool for effective telecommunication in the north-central portion of this state.
Where is 720 Area Code Located?
This 720 phone code covers the north-central portion of the U.S. state of Colorado. It primarily serves the Denver metropolitan in central Colorado. Major cities in this region are Denver, Aurora, Thornton, Lakewood, Westminster, Centennial, and Arvada. It covers 26 cities and 9 counties. Denver, Jefferson, and Arapahoe are popular counties covered by this dialing code.
History of Area Code 720
The North American Numbering Plan Administrator (NANPA) established 720 as the regional telephone code for north-central parts of Colorado on June 1, 1998. It was the 238th telephone code in service in the US.
720 was launched to relieve pressure on the Denver area’s original code, 303. Before the introduction of 720, 303 covered the entire state. So, 720 became an overlay of 303, serving the same regions.
720 was the fourth local code for the state of Colorado. Currently, Colorado has five telephone codes. 983 is the latest addition to 720 as an overlay. NANPA launched 983 on June 17, 2022, to relieve pressure on 720 as the numbers in 720 were being exhausted.
What Time Zone is the Area Code 720 In?
This telephone code 720 is located within Mountain Time(MT) and follows daylight saving time from early March to early November. While following the standard time, it falls 7 hours behind the Coordinated Universal Time(UTC) and the Greenwich Mean Time (GMT). It falls 6 hours behind the UTC/GMT during daylight saving time.
Dialing Format for 720 Area Code
The dialing pattern to connect to the phone number with dialing code 720 is:
For Local Calls: Dial 123-XXXX, where 123 is the central office code or the exchange code that directs the calls to the local network, and XXXX is the subscriber number
For Regional Calls: The US number structure for calls between different area codes consists of a regional code and a 7-digit phone number of the receiver. E.g. 720-123-XXXX or 1-720-123-XXXX.
Note: In areas that have implemented the 10-digit dialing system, 1 should be dialed before the local code to make the call successful.
For International Calls, enter 011-1-720-123-XXX, where 011 is the international access code of the caller’s country. 1 is the US country code, 720 is the regional code of the intended region, and the last 7 digits are the recipient’s phone number.
Top 5 Counties in Area Code 720
- Denver
- Jefferson
- Arapahoe
- Adams
- Boulder
Top 20 Cities in Area Code 720
| Denver | Littleton |
| aurora | Brighton |
| Thornton | Englewood |
| Arvada | Golden |
| Boulder | Lone Tree |
| Longmont | Evergreen |
| Fort Lupton | Strasburg |
| Bennett | Lyons |
| Idaho Springs | Hudson |
| Byers | Keensburg |
ZIP Codes in Area Code 720
| ZIP Code | Location |
|---|---|
| 80001-80007 | Arvada |
| 80011-80019, 80040-80047 | Aurora |
| 80020-80023, 80038 | Broomfield |
| 80024 | Dupont |
| 80025 | Eldorado Springs |
| 80026 | Lafayette |
| 80027 | Louisville |
| 80030, 80031, 80035, 80036 | Westminster |
| 80033, 80034 | Wheat Ridge |
| 80037 | Commerce City |
| 80102 | Bennett |
| 80103 | Byers |
| 80104 | Castle Rock |
| 80105 | Deer Trail |
| 80106 | Elbert |
| 80107 | Elizabeth |
| 80108 | Castle Rock |
| 80110-80113, 80150, 80151, 80155 | Englewood |
| 80116 | Franktown |
| 80117 | Kiowa |
| 80118 | Larkspur |
| 80120-80130, 80160-80163, 80165, 80166 | Littleton |
| 80131 | Louviers |
| 80134, 80138 | Parker |
| 80135 | Sedalia |
| 80136 | Strasburg |
| 80137 | Watkins |
| 80201-80203 | Denver |
Nearby Area Codes
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Frequently Asked Questions
When we talk to clients about our IT services for their company, a few of the same questions come up.
Is 720 a valid area code?
Yes, 720 is a valid local telephone code of the Denver metropolitan area in Colorado.
Where do you live if your phone number starts with 720?
If your phone number starts with 720, you are likely to live in the Denver metropolitan area, including suburbs like Lakemont, Littleton, Broomfield, and Colorado.
What is the 720 area code zip code?
The zip codes of the 720 area lies between 80001-80203. Arvada has the lowest zip code, 80001 and Denver City includes the highest zip code, 80203.
What is area code 720 time zone?
The time zone of local code 720 is Mountain time. Time here is 7 hours behind the UTC/GMT-7:00 hours, and during daylight saving time, it falls 6 hours behind.
Are 720 area code scams?
No, the 720 area code is not a scam itself. However, scammers can misuse it at any time.
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