(303) 552-2437
Denver, CO
(303) 552-2437 is reported as unwanted: 2 FTC complaints and 1 FCC complaint, mostly about energy, solar and utilities.
- 1 FTC complaint dated in the 30 days to Nov 13, 2026, none in the 90 days before.
- More FTC complaints than 89% of the 26,440 numbers with FTC complaints in area code 303.
- No number in the 303-552 block has more complaints; 44 numbers there have FTC complaints.
Complaint history
2 FTC complaints between May 1, 2026 and Nov 9, 2026.
The FTC complaints came in 2 of the 7 months from May 2026 to Nov 2026.
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
1 complaint to the U.S. Federal Communications Commission on May 1, 2026.
The complainant heard a live person. They filed it as unwanted calls (1). The calls were about health insurance (1). Complainants were in Colorado (1).
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
1 of its 2 FTC complaints (50%) is about energy, solar and utilities; across area code 303 that isn't one of the 8 commonest call types (each of those is at least 1% of its FTC complaints).
Complaint categories chosen by FTC complainants:
- Energy, solar & utilities 1 · 50%
- Medical & prescriptions 1 · 50%
Who called
The number's block is assigned to Level 3 Communications, LLC in Denver, CO.
Is it a debt collector?
Nothing says it is: none of its 3 complaints describe debt collection.
Nearby numbers in 303-552
44 numbers in 303-552 have 47 FTC complaints between them (53% robocalls), 2 of them about (303) 552-2437. The commonest categories in the block: Medical & prescriptions (23%), Calls pretending to be government, businesses, or family and friends (11%).
The closest reported numbers on either side of (303) 552-2437, in number order.
When the calls came
Time of day of 2 calls:
Day of the week of 2 calls:
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 Communications, 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.
Both FTC complainants were in Colorado. Statewide, Colorado ranks #7 of the 50 states and DC for Do Not Call complaints per resident: 59,905 in the last 12 months, 996.3 per 100,000 people. Spam calls in Colorado.
Where FTC complainants were located (U.S. states):
- Colorado 2 · 100%
Complainants' cities:
Dallas, CO (1) · Longmont, CO (1)
As typed on the FTC form, with spelling variants merged; complaints without a city aren't counted.
Searches on Canadial
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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 (303) 552-2437
- Who called me from (303) 552-2437?
- No complaint names the caller; FTC complainants most often said the calls were about energy, solar and utilities. The number is in a block assigned to Level 3 Communications, LLC in Denver, CO (NANPA, Nov 3, 2026); numbers can move between carriers, so the caller's provider may differ.
- Is (303) 552-2437 a scam?
- Canadial rates it medium risk, from 3 complaints, latest Nov 9, 2026.
- Is (303) 552-2437 a debt collector or collection agency?
- Nothing says it is: none of its 3 complaints describe debt collection.
- Should I call (303) 552-2437 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 (303) 552-2437 been reported?
- 2 complaints to the U.S. FTC's Do Not Call registry between May 1, 2026 and Nov 9, 2026 and 1 complaint to the U.S. FCC on May 1, 2026.
- What do callers from (303) 552-2437 say?
- 1 of its 2 FTC complaints (50%) is about energy, solar and utilities; across area code 303 that isn't one of the 8 commonest call types (each of those is at least 1% of its FTC complaints).
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.