(408) 403-3688
(408) 403-3688 has 2 FTC complaints, mostly about lotteries, prizes and sweepstakes.
- No new complaints since Nov 17, 2025 (FTC data through Nov 13, 2026).
- More FTC complaints than 87% of the 22,801 numbers with FTC complaints in area code 408.
- Only 4 numbers in the 408-403 block have more complaints, of 107 there with FTC complaints.
Complaint history
2 FTC complaints between Jul 15, 2025 and Nov 17, 2025.
The FTC complaints came in 2 of the 5 months from Jul 2025 to Nov 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 lotteries, prizes and sweepstakes; across area code 408 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:
- Lotteries, prizes & sweepstakes 1 · 50%
- Work from home & other ways to make money 1 · 50%
Who called
The number's block is assigned to Onvoy, LLC.
Is it a debt collector?
Nothing says it is: none of its 2 complaints describe debt collection.
Nearby numbers in 408-403
107 numbers in 408-403 have 123 FTC complaints between them (45% robocalls), 2 of them about (408) 403-3688. The commonest categories in the block: Dropped call or no message (22%), Reducing your debt (credit cards, mortgage, student loans) (11%), Calls pretending to be government, businesses, or family and friends (10%).
The closest reported numbers on either side of (408) 403-3688, in number order.
When the calls came
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
- Rate centre (NANPA abbreviation)
- SNJS SOUTH, 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.
FTC complainants were in Arizona (1) and Maryland (1).
Where FTC complainants were located (U.S. states):
- Arizona 1 · 50%
- Maryland 1 · 50%
Complainants' cities:
Lake Havasu City, AZ (1) · Mechanicsville, MD (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 (408) 403-3688
- Who called me from (408) 403-3688?
- No complaint names the caller; FTC complainants most often said the calls were about lotteries, prizes and sweepstakes. The number is in a block assigned to Onvoy, LLC (rate centre SNJS SOUTH, CA) (NANPA, Nov 3, 2026); numbers can move between carriers, so the caller's provider may differ.
- Is (408) 403-3688 a scam?
- Canadial rates it low risk, from 2 complaints, latest Nov 17, 2025.
- Is (408) 403-3688 a debt collector or collection agency?
- Nothing says it is: none of its 2 complaints describe debt collection.
- Should I call (408) 403-3688 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 (408) 403-3688 been reported?
- 2 complaints to the U.S. FTC's Do Not Call registry between Jul 15, 2025 and Nov 17, 2025.
- What do callers from (408) 403-3688 say?
- 1 of its 2 FTC complaints (50%) is about lotteries, prizes and sweepstakes; across area code 408 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; numbering records as of Nov 3, 2026; community reports live. How this page is built.