(303) 483-9304

2 FTC complaints on Dec 7, 2025.

Both FTC complaints are about calls in Dec 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.

What callers claimed

1 of its 2 FTC complaints (50%) is about home security and alarms; 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:

• Home security & alarms 1 · 50%
• Warranties & protection plans 1 · 50%

The number's block is assigned to T-Mobile USA, Inc. in Denver, CO.

Time of day of 2 calls; most often the 2 p.m. hour (2):

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 of the number block

Denver, CO, USA

Block assigned to

T-Mobile USA, Inc.

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.

Area code 303: where it is, time zone, spam calls →

• 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.

Who called me from (303) 483-9304?

No complaint names the caller; FTC complainants most often said the calls were about home security and alarms. The number is in a block assigned to T-Mobile USA, Inc. in Denver, CO (NANPA, Nov 3, 2026); numbers can move between carriers, so the caller's provider may differ.

Is (303) 483-9304 a scam?

Canadial rates it low risk, from 2 complaints, latest Dec 7, 2025.

Is (303) 483-9304 a debt collector or collection agency?

Nothing says it is: none of its 2 complaints describe debt collection.

Should I call (303) 483-9304 back?

Be careful. If you don't recognize it, let it go to voicemail: a legitimate caller will leave a message, and you can reach any real organization on a number you look up yourself.

How many times has (303) 483-9304 been reported?

2 complaints to the U.S. FTC's Do Not Call registry on Dec 7, 2025.

What do callers from (303) 483-9304 say?

1 of its 2 FTC complaints (50%) is about home security and alarms; 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).

When does (303) 483-9304 call?

In FTC complaints, the most common time was the 2 p.m. hour (2 of 2 calls with a time); the most common day was Sunday (2 of 2).