(650) 437-9737
San Mateo, CA
(650) 437-9737 is reported as unwanted: 1 FTC complaint and 3 FCC complaints.
- No new complaints since Jul 14, 2022 (FTC data through Nov 13, 2026).
- Only 6 numbers in the 650-437 block have more complaints, of 31 there with FTC complaints.
Complaint history
1 FTC complaint on Jul 14, 2022.
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
3 complaints to the U.S. Federal Communications Commission between Jan 28, 2019 and Jan 29, 2019.
All 3 got a call that hung up or stayed silent. They filed them as unwanted calls (3). Complainants were in New York (3).
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
Complaint categories chosen by FTC complainants:
- Not specified / other 1 · 100%
Who called
The number's block is assigned to Level 3 Communications, LLC in San Mateo, CA.
Is it a debt collector?
Nothing says it is: none of its 4 complaints describe debt collection.
Nearby numbers in 650-437
The closest reported numbers on either side of (650) 437-9737, in number order.
All reported numbers in 650-437 →Location
- Location of the number block
- San Mateo, CA, 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.
The one FTC complainant was in Georgia. Statewide, Georgia ranks #13 of the 50 states and DC for Do Not Call complaints per resident: 99,166 in the last 12 months, 877.4 per 100,000 people. Spam calls in Georgia.
Where FTC complainants were located (U.S. states):
- Georgia 1 · 100%
Complainants' cities:
Marietta, GA (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 (650) 437-9737
- Who called me from (650) 437-9737?
- No complaint names the caller. The number is in a block assigned to Level 3 Communications, LLC in San Mateo, CA (NANPA, Nov 3, 2026); numbers can move between carriers, so the caller's provider may differ.
- Is (650) 437-9737 a scam?
- Canadial rates it medium risk, from 4 complaints, latest Jul 14, 2022.
- Is (650) 437-9737 a debt collector or collection agency?
- Nothing says it is: none of its 4 complaints describe debt collection.
- Should I call (650) 437-9737 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 (650) 437-9737 been reported?
- 1 complaint to the U.S. FTC's Do Not Call registry on Jul 14, 2022 and 3 complaints to the U.S. FCC between Jan 28, 2019 and Jan 29, 2019.
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.