720 Area Code — Denver Metro, Colorado
About the 720 Area Code
Area code 720 covers Denver Metro, Colorado, a metropolitan market with a diverse mix of mobile, landline, and VoIP subscribers across residential and commercial accounts. Primary carriers include AT&T Mobility, Verizon Wireless, and T-Mobile USA. The area encompasses Denver and Boulder and operates in the Mountain time zone, supporting a broad range of modern telecommunications services.
Key Information
- Region: Denver Metro
- State / Province: Colorado
- Timezone: Mountain
- Major Cities: Denver, Boulder
Area Code Overview
Area code 720 was established in 1998 as the first overlay for Colorado's original 303 code, covering the same geographic territory as 303 — metropolitan Denver, Aurora, Lakewood, Englewood, Arvada, Westminster, Thornton, and Littleton. Because 720 was introduced at the height of the mobile phone expansion era, its number pool skews heavily toward wireless lines. Denver has evolved into a major technology, aerospace, and cybersecurity hub — Boeing, Lockheed Martin, Raytheon, and dozens of tech startups maintain significant operations in the metro area. The Denver Tech Center (DTC) in the southeastern suburbs is home to hundreds of technology companies, creating a professional workforce with high-value digital credentials.
Scam Patterns in 720
Colorado Unemployment Benefits Overpayment Demand Fraud
During the COVID-19 pandemic, the Colorado Department of Labor and Employment (CDLE) experienced massive unemployment fraud — claimants' identities were stolen by organized fraud rings that collected benefits in their names. The follow-on scam emerged as the state attempted to recover overpayments: fraudsters send texts impersonating CDLE claiming the recipient owes an overpayment from a fraudulent claim filed in their name, and must pay immediately or face wage garnishment. Victims who never filed for unemployment are confronted with a confusing combination of real state debt collection activity and fraudulent copycat texts — making this one of the most difficult fraud patterns to detect.
Denver Tech Sector Recruiting and Credential Phishing
The Denver Tech Center concentrates tech industry employers — Dish Network, SiriusXM, Comcast, Arrow Electronics, and hundreds of smaller software firms. Scam texts from 720 numbers impersonate technical recruiters or internal HR at named DTC companies, offering high-salary roles and directing candidates to a fake application portal that harvests LinkedIn credentials, GitHub tokens, and personal information. A variant targets existing employees with texts impersonating IT, claiming a Slack or Microsoft 365 account requires security revalidation.
Colorado Secretary of State Business Registration Fraud
Colorado processes hundreds of new business filings monthly, and small business owners receive legitimate confirmation texts from the state. Scam texts impersonate the Colorado Secretary of State's office, claiming a newly registered LLC or corporation is missing a filing requirement, an annual report fee is overdue, or a registered agent change requires confirmation — directing owners to a fake sos.colorado.gov portal that collects business banking information and payment card numbers.
VoIP and Spoofing Risk Assessment
Risk Level: MODERATE
As a mobile-era overlay, 720 skews heavily toward wireless numbers with a substantial VoIP component from the DTC's business phone infrastructure. The unemployment overpayment scam is particularly insidious in the Colorado context because real CDLE overpayment collection is ongoing — some recipients receive both legitimate state collection notices and fraudulent scam texts simultaneously, making independent verification essential. Tech sector credential phishing in the DTC represents high-value targets for organized threat actors.
What To Do If You Receive a Text From a 720 Number
Step 1: Verify any CDLE unemployment overpayment claim through your MyUI+ account. Log into myui.coworkforce.com directly to see your actual claim status and any legitimate overpayment notices. CDLE's official communications arrive by mail for debt collection. Contact CDLE at 303-318-9000 to verify.
Step 2: Look up the number. Search at Who Sent That Text Message to check for prior reports, especially for unemployment overpayment demands, tech recruiting offers, or Secretary of State filing alerts.
Step 3: Verify business filing status at the Colorado SOS directly. Access the Colorado Secretary of State's business filing system at sos.colorado.gov/biz. Do not use links in texts for business compliance actions. See our guide on how to identify text message scams.
Step 4: Report. Forward to 7726 (SPAM). Report unemployment fraud to CDLE at coworkforce.com. Report business registration fraud to the CO Secretary of State. File with the FTC at reportfraud.ftc.gov.
Frequently Asked Questions
What area code is 720?
Area code 720 is a Denver metro overlay established in 1998, covering identical geography to 303 — metropolitan Denver, Aurora, Lakewood, and the Denver Tech Center area. Because it was created during mobile expansion, 720 numbers skew heavily toward wireless lines.
Is area code 720 used for scams?
720 is a legitimate Denver metro area code. Documented scam patterns include Colorado unemployment benefits overpayment demand fraud — particularly tricky because real CDLE collection is ongoing — Denver Tech Center recruiting and credential phishing, and Colorado Secretary of State business registration fraud. Verify any 720 text involving unemployment payments, job application portals, or state business filings through official channels.
Why is Colorado unemployment overpayment fraud particularly difficult to detect?
During the COVID-19 pandemic, Colorado's CDLE was hit with massive organized identity fraud, and the state is legitimately pursuing overpayment recovery from both fraudulent claimants and, in some cases, from victims whose identities were used. This creates a situation where some recipients receive real collection notices alongside scam texts — both referencing overpayments, both appearing official. Independent verification through MyUI+ and direct phone contact with CDLE is the only reliable distinction.
Related Area Codes
- 303 — The original Denver metro code. Shares identical geography with 720; established businesses and long-tenured residents typically hold 303 numbers.
- 719 — Southern Colorado (Colorado Springs, Pueblo). The other major Colorado area code, covering the southern portion of the state.
- 970 — Western and northern Colorado (Fort Collins, ski resort mountain communities). Borders 720/303 metro territory to the north and west.
Carriers & Network Type for 720 Numbers
Network mix: Mixed — 720 numbers include mobile, landline, and VoIP lines.
Common Scam Patterns
FCC complaint data for 720 numbers includes:
- Robocall/Auto-dialer
- Spoofed caller ID
- IRS/Government impersonation
- Tech support scam
If You Got a Text from 720
Who Typically Calls from the 720 Area Code?
Area code 720 covers Denver Metro, Colorado, a metropolitan market with a diverse mix of mobile, landline, and VoIP subscribers across residential and commercial accounts. Primary carriers include AT&T Mobility, Verizon Wireless, and T-Mobile USA. The area encompasses Denver and Boulder and operates in the Mountain time zone, supporting a broad range of modern telecommunications services. Calls from 720 numbers originate in Denver Metro, Colorado. Residents, local businesses, schools, medical offices, and government agencies in this region all use 720 numbers. If you received an unexpected call or text from a 720 number, it may be a neighbor, a local service provider, or — in some cases — an unwanted solicitor.
Because 720 is a legitimate, widely used area code, scammers sometimes spoof it to make their calls appear local and trustworthy. This technique — called neighbor spoofing — makes it more likely that recipients will answer. A reverse phone lookup is the fastest way to find out whether a 720 number is genuinely local or spoofed.
Is a 720 Phone Number Spam?
Not all 720 calls are spam, but the area code is not immune to robocall campaigns and phone scams. Common complaints about 720 numbers include warranty extension scams, debt collection harassment, IRS impersonation calls, and unsolicited insurance offers.
If a 720 number called you and didn't leave a voicemail, that's a red flag — legitimate callers typically leave a message. Use Who Sent That Text Message to look up the number instantly and see whether other users have flagged it as spam.
You can also report a suspicious 720 number directly from our lookup results, helping protect others in the community from the same caller.
Look Up a 720 Number Now
Enter any 720 area code phone number below and get instant results — carrier, line type, caller name (where available), and spam reports submitted by real users.
Other Area Codes in Colorado
Colorado has multiple area codes serving different regions. If the number you received isn't from 720, check one of the other Colorado area codes below.