(720) 456-3777
Denver, CO
(720) 456-3777 is likely a robocall: 14 FTC complaints, 93% recorded messages, most often about dropped calls or silence (43%).
- No new complaints since Apr 21, 2024 (FTC data through Nov 13, 2026).
- More FTC complaints than 99% of the 31,610 numbers with FTC complaints in area code 720.
- Only 8 numbers in the 720-456 block have more complaints, of 75 there with FTC complaints.
Complaint history
14 FTC complaints between Jan 1, 2023 and Apr 21, 2024.
The FTC complaints came in 4 of the 16 months from Jan 2023 to Apr 2024; the busiest was Jan 2023, with 11 of 14.
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.
What callers claimed
6 of its 14 FTC complaints (43%) are about dropped calls or silence, against 16% of the 40,642 FTC complaints about all numbers in area code 720.
Complaint categories chosen by FTC complainants:
- Not specified / other 7 · 50%
- Dropped call or no message 6 · 43%
- Reducing your debt (credit cards, mortgage, student loans) 1 · 7%
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 14 complaints describe debt collection.
Nearby numbers in 720-456
The closest reported numbers on either side of (720) 456-3777, in number order.
When the calls came
Time of day of 13 calls:
Day of the week of 14 calls; most often Friday (7):
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 14 complainants have area code 720, the number's own. The calls reached people elsewhere, so this isn't a local caller to them.
Most FTC complainants were in Idaho (6 of 14); others in Michigan (5), California (1) and Colorado (1) and more. Statewide, Idaho ranks #23 of the 50 states and DC for Do Not Call complaints per resident: 14,882 in the last 12 months, 733.2 per 100,000 people. Spam calls in Idaho.
Where FTC complainants were located (U.S. states):
- Idaho 6 · 43%
- Michigan 5 · 36%
- California 1 · 7%
Show 2 more states Show fewer
- Colorado 1 · 7%
- Washington 1 · 7%
Complainants' cities:
Ammon, ID (6) · Spokane Valley, WA (1) · Tustin, CA (1)
As typed on the FTC form, with spelling variants merged; complaints without a city aren't counted.
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Recent community reports
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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) 456-3777
- Who called me from (720) 456-3777?
- No complaint names the caller; FTC complainants most often said the calls were about dropped calls or silence. 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) 456-3777 a scam?
- Canadial rates it medium risk, from 14 complaints, latest Apr 21, 2024, 93% robocalls.
- Is (720) 456-3777 a debt collector or collection agency?
- Nothing says it is: none of its 14 complaints describe debt collection.
- Should I call (720) 456-3777 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) 456-3777 been reported?
- 14 complaints to the U.S. FTC's Do Not Call registry between Jan 1, 2023 and Apr 21, 2024.
- What do callers from (720) 456-3777 say?
- 6 of its 14 FTC complaints (43%) are about dropped calls or silence, against 16% of the 40,642 FTC complaints about all numbers in area code 720.
- When does (720) 456-3777 call?
- In FTC complaints, the most common day was Friday (7 of 14).
Data updated: FTC complaints through Nov 13, 2026; numbering records as of Nov 3, 2026; community reports live. How this page is built.