(951) 537-5503
(951) 537-5503 is likely an unwanted sales call: 3 FTC complaints, 33% recorded messages.
- No FTC complaints dated in the 30 days to Nov 13, 2026, 1 in the 90 days before.
- More FTC complaints than 95% of the 25,399 numbers with FTC complaints in area code 951.
- No number in the 951-537 block has more complaints; 113 numbers there have FTC complaints.
Complaint history
3 FTC complaints between Jan 15, 2025 and Sep 17, 2026.
The FTC complaints came in 3 of the 21 months from Jan 2025 to Sep 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.
What callers claimed
Complaint categories chosen by FTC complainants:
- Not specified / other 3 · 100%
Who called
The number's block is assigned to Onvoy, LLC.
Is it a debt collector?
Nothing says it is: none of its 3 complaints describe debt collection.
Nearby numbers in 951-537
113 numbers in 951-537 have 127 FTC complaints between them (51% robocalls), 3 of them about (951) 537-5503. The commonest categories in the block: Dropped call or no message (17%), Reducing your debt (credit cards, mortgage, student loans) (10%).
The closest reported numbers on either side of (951) 537-5503, in number order.
When the calls came
Time of day of 2 calls:
Day of the week of 3 calls; most often Thursday (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
- Rate centre (NANPA abbreviation)
- HEMT HEMT, CA, USA
- Block assigned to
- Onvoy, 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.
All 3 FTC complainants were in California. Statewide, California ranks #26 of the 50 states and DC for Do Not Call complaints per resident: 283,769 in the last 12 months, 721 per 100,000 people. Spam calls in California.
Where FTC complainants were located (U.S. states):
- California 3 · 100%
Complainants' cities:
Sunnyvale, CA (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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Report (951) 537-5503
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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 (951) 537-5503
- Who called me from (951) 537-5503?
- No complaint names the caller. The number is in a block assigned to Onvoy, LLC (rate centre HEMT HEMT, CA) (NANPA, Nov 3, 2026); numbers can move between carriers, so the caller's provider may differ.
- Is (951) 537-5503 a scam?
- Canadial rates it medium risk, from 3 complaints, latest Sep 17, 2026, 33% robocalls.
- Is (951) 537-5503 a debt collector or collection agency?
- Nothing says it is: none of its 3 complaints describe debt collection.
- Should I call (951) 537-5503 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 (951) 537-5503 been reported?
- 3 complaints to the U.S. FTC's Do Not Call registry between Jan 15, 2025 and Sep 17, 2026.
- When does (951) 537-5503 call?
- In FTC complaints, the most common day was Thursday (2 of 3).
Data updated: FTC complaints through Nov 13, 2026; numbering records as of Nov 3, 2026; community reports live. How this page is built.