(720) 456-3680
Denver, CO
(720) 456-3680 is likely a robocall: 10 FTC complaints and 10 FCC complaints, recorded messages in 50% of the FTC complaints, most often about impersonating a government agency, business or relative (20%).
- No new complaints since Aug 20, 2025 (FTC data through Nov 13, 2026).
- More FTC complaints than 99% of the 31,610 numbers with FTC complaints in area code 720.
Complaint history
10 FTC complaints between Feb 20, 2023 and Aug 20, 2025.
The FTC complaints came in 6 of the 31 months from Feb 2023 to Aug 2025.
FTC complaints are filed by consumers with the U.S. Federal Trade Commission's Do Not Call registry; they aren't verified by the FTC or by us.
Complaints to the FCC
10 complaints to the U.S. Federal Communications Commission between Jul 30, 2015 and Jul 10, 2023; 1 gave it as the number to call back rather than the caller ID.
Of the 10 complainants, 4 got a call that hung up or stayed silent, 3 heard a live person and 3 heard a recorded message. They filed them as unwanted calls (5), telemarketing (4) and robocalls (1). Complainants were in New York (4), Arizona (1), Illinois (1), Ohio (1) and South Carolina (1) and other states.
Source: FCC Consumer Help Center, Consumer Complaints Data (public domain), complaints about unwanted calls, telemarketing and robocalls. The FCC doesn't verify the facts alleged in complaints, and neither do we.
What callers claimed
2 of its 10 FTC complaints (20%) are about impersonating a government agency, business or relative, against 9% of the 40,642 FTC complaints about all numbers in area code 720.
Complaint categories chosen by FTC complainants:
- Not specified / other 7 · 70%
- Calls pretending to be government, businesses, or family and friends 2 · 20%
- Dropped call or no message 1 · 10%
Who called
The number's block is assigned to Level 3 Telecom of Colorado, LLC in Denver, CO.
Is it a debt collector?
Nothing says it is: none of its 20 complaints describe debt collection.
Nearby numbers in 720-456
The closest reported numbers on either side of (720) 456-3680, in number order.
All reported numbers in 720-456 →When the calls came
Time of day of 10 calls:
Day of the week of 10 calls; most often Tuesday (4):
The date and time of the call as complainants entered them on the FTC form; the time zone isn't recorded. Times entered as exactly midnight or noon are left out (they're usually the form's default).
Location
- Location of the number block
- Denver, CO, USA
- Block assigned to
- Level 3 Telecom of Colorado, LLC
From the North American Numbering Plan Administrator (Nov 3, 2026). This is who the number block was assigned to; numbers can be moved between carriers, and caller IDs can be faked.
None of 10 complainants have area code 720, the number's own. The calls reached people elsewhere, so this isn't a local caller to them.
FTC complainants were in Connecticut (2), New York (2), Pennsylvania (2) and Arizona (1), among others.
Where FTC complainants were located (U.S. states):
- Connecticut 2 · 20%
- New York 2 · 20%
- Pennsylvania 2 · 20%
Show 3 more states Show fewer
- Arizona 1 · 10%
- Illinois 1 · 10%
- Mississippi 1 · 10%
Complainants' cities (most common):
Sunnyside, NY (2) · Downers Grove, IL (1) · Green Valley, AZ (1) · Hanover Township, PA (1) · Irwin, PA (1)
As typed on the FTC form, with spelling variants merged; complaints without a city aren't counted.
Searches on Canadial
Loading…
Real visits to this page, counted once per visitor per day.
Did (720) 456-3680 call you?
Loading…
Answers from visitors, one per person per month (asked at the top of the page).
Report (720) 456-3680
Tell others what the call was about. Reports appear on this page; no account needed.
Recent community reports
No community reports yet. Be the first to describe this call.
What to do
- Don't share personal or banking details, or pay anyone, on a call you didn't expect. Hang up and call the organization back on a number you find yourself.
- Block it from your recent calls (iPhone: ⓘ, then “Block this Caller”; Android: long-press, then “Block”).
- Report fraud to the Canadian Anti-Fraud Centre (1-888-495-8501).
- Report telemarketing if you're registered and still got the call: to the National Do Not Call List.
- A collector calling? How to check a collection agency in your province.
- Report fraud to the FTC.
- Report telemarketing if you're registered and still got the call: to the National Do Not Call Registry.
- A collector calling? See the FTC's guide to your rights.
- Report fraud: in the U.S. to the FTC; in Canada to the Canadian Anti-Fraud Centre (1-888-495-8501).
- Report telemarketing if you're registered and still got the call: in the U.S. to the National Do Not Call Registry; in Canada to the National Do Not Call List.
- A collector calling? In the U.S., see the FTC's guide to your rights; in Canada, how to check a collection agency in your province.
Questions about (720) 456-3680
- Who called me from (720) 456-3680?
- No complaint names the caller; FTC complainants most often said the calls were about impersonating a government agency, business or relative. The number is in a block assigned to Level 3 Telecom of Colorado, LLC in Denver, CO (NANPA, Nov 3, 2026); numbers can move between carriers, so the caller's provider may differ.
- Is (720) 456-3680 a scam?
- Canadial rates it medium risk, from 20 complaints, latest Aug 20, 2025, robocalls in 50% of the FTC complaints.
- Is (720) 456-3680 a debt collector or collection agency?
- Nothing says it is: none of its 20 complaints describe debt collection.
- Should I call (720) 456-3680 back?
- No. Calling back can confirm that your line is answered. If the caller claimed to be a company or agency you deal with, contact it on a number you find yourself.
- How many times has (720) 456-3680 been reported?
- 10 complaints to the U.S. FTC's Do Not Call registry between Feb 20, 2023 and Aug 20, 2025 and 10 complaints to the U.S. FCC between Jul 30, 2015 and Jul 10, 2023.
- What do callers from (720) 456-3680 say?
- 2 of its 10 FTC complaints (20%) are about impersonating a government agency, business or relative, against 9% of the 40,642 FTC complaints about all numbers in area code 720.
- When does (720) 456-3680 call?
- In FTC complaints, the most common day was Tuesday (4 of 10).
Data updated: FTC complaints through Nov 13, 2026; FCC complaints refreshed daily; numbering records as of Nov 3, 2026; community reports live. How this page is built.