(650) 645-9664
San Mateo, CA
(650) 645-9664 is likely a robocall: 41 FTC complaints and 5 FCC complaints, recorded messages in 68% of the FTC complaints, most often about impersonating a government agency, business or relative (37%).
- No new complaints since Dec 15, 2022 (FTC data through Nov 13, 2026).
- More FTC complaints than 99% of the 20,239 numbers with FTC complaints in area code 650.
- No number in the 650-645 block has more complaints; 21 numbers there have FTC complaints.
Complaint history
41 FTC complaints between May 26, 2022 and Dec 15, 2022.
The FTC complaints came in every month from May 2022 to Dec 2022; the busiest was Jun 2022, with 9 of 41.
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
5 complaints to the U.S. Federal Communications Commission between Aug 4, 2022 and Oct 11, 2022; all gave it as the number to call back rather than the caller ID.
Of the 5 complainants, 4 heard a live person and 1 heard a recorded message. They filed them as unwanted calls (5). The calls were about legal actions (2) and criminal charges (1). Complainants were in New York (2), Florida (1), Tennessee (1) and Texas (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
15 of its 41 FTC complaints (37%) are about impersonating a government agency, business or relative, against 14% of the 26,373 FTC complaints about all numbers in area code 650.
Complaint categories chosen by FTC complainants:
- Not specified / other 20 · 49%
- Calls pretending to be government, businesses, or family and friends 15 · 37%
- Reducing your debt (credit cards, mortgage, student loans) 6 · 15%
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 46 complaints describe debt collection.
Nearby numbers in 650-645
The closest reported numbers on either side of (650) 645-9664, in number order.
All reported numbers in 650-645 →When the calls came
Time of day of 35 calls; most often the 4 p.m. hour (6):
Day of the week of 41 calls; most often Thursday (14):
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
- 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.
1 of 41 complainants has area code 650, the number's own. The calls reached people elsewhere, so this isn't a local caller to them.
Most FTC complainants were in California (8 of 41); others in North Carolina (3), Pennsylvania (3) and Arizona (2) and more. 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 8 · 20%
- North Carolina 3 · 7%
- Pennsylvania 3 · 7%
Show 3 more states Show fewer
- Arizona 2 · 5%
- Florida 2 · 5%
- New Hampshire 2 · 5%
Complainants' cities (most common):
Greensburg, PA (3) · Laconia, NH (2) · Los Angeles, CA (2) · Buffalo, NY (1) · Burbank, 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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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) 645-9664
- Who called me from (650) 645-9664?
- No complaint names the caller; FTC complainants most often said the calls were about impersonating a government agency, business or relative. 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) 645-9664 a scam?
- Canadial rates it medium risk, from 46 complaints, latest Dec 15, 2022, robocalls in 68% of the FTC complaints.
- Is (650) 645-9664 a debt collector or collection agency?
- Nothing says it is: none of its 46 complaints describe debt collection.
- Should I call (650) 645-9664 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) 645-9664 been reported?
- 41 complaints to the U.S. FTC's Do Not Call registry between May 26, 2022 and Dec 15, 2022 and 5 complaints to the U.S. FCC between Aug 4, 2022 and Oct 11, 2022.
- What do callers from (650) 645-9664 say?
- 15 of its 41 FTC complaints (37%) are about impersonating a government agency, business or relative, against 14% of the 26,373 FTC complaints about all numbers in area code 650.
- When does (650) 645-9664 call?
- In FTC complaints, the most common time was the 4 p.m. hour (6 of 35 calls with a time); the most common day was Thursday (14 of 41).
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.