Find out who called from that unknown San Francisco number using our free reverse phone lookup service. Enter the full 10-digit number (including 628 and 415 or any other US area code) to search for available caller information including name, address, phone carrier, and more.
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Got a phone call or message from a San Francisco, California phone number you don't recognize? Before you answer, call back, or reply, use our phone number lookup service to find out who's really on the other end, is it a scam, legitimate business or someone you'd rather avoid.
The total population of San Francisco, CA, is 873,965. That's hundreds of thousands of potential callers you might not recognize: business contacts, neighbors, service providers, or complete strangers from the other part of the city.
When an unknown number calls, you're playing a lottery. Is it a sales call or someone you actually want to talk to? Without knowing who's calling, you either risk missing crucial calls or waste time on unwanted ones. That's where caller identification becomes essential.
Scam and spam calls continue to impact CA residents which, according to the National Do Not Call Registry Data Book, filed 287,916 complaints about unwanted calls in 2024. Of these, 161548 were robocalls, while 98127 involved live callers. The top complaint topics included imposters (27125), reducing debt (20756), medical and prescriptions (13374).
According to FTC 2024 data, CA residents reported 238,705 fraud cases in 2024, resulting in $1,678,703,608 in losses, with a median loss of $542 per victim. Given that more than 1 in 3 fraud attempts occur over the phone, verifying who is calling is critical for preventing financial losses.
If you receive fraudulent calls or suspect a scam attempt, report it to reportfraud.ftc.gov or local police department using the following contacts:
201 Williams Avenue, San Francisco, CA 94124-2558
766 Vallejo Street, San Francisco, CA 94133-3818
1 Sergeant John V Young Lane, San Francisco, CA 94112-2408
630 Valencia Street, San Francisco, CA 94110-1126
1125 Fillmore Street, San Francisco, CA 94115-4711
1899 Waller Street, San Francisco, CA 94117-2768
461 6Th Avenue, San Francisco, CA 94118-3009
850 Bryant Street, San Francisco, CA 94103-4603
2345 24Th Avenue, San Francisco, CA 94116-2331
301 Eddy Street, San Francisco, CA 94102-2606
Additionally, protect your household by registering your phone numbers at donotcall.gov or by calling 1-888-382-1222 from the number you wish to register.
Have you received a call from a business but aren’t sure if it’s really them? San Francisco is primarily located in San Francisco County, which, according to U.S. Census Bureau data, includes 29,049 firms and 33,513 establishments employing 732,257 people.
| County | Percent of City | Firms | Establishments |
|---|---|---|---|
| San Francisco | 100.00% | 29049 | 33513 |
Use our service to reverse-lookup unknown California phone numbers to verify whether they actually belong to a company before answering or calling back. By cross-referencing phone numbers with local business directories, you can ensure you’re dealing with legitimate local businesses, services, contractors, or vendors—not scammers spoofing local numbers to gain your trust.
San Francisco area codes are 415, 628, 650. Phone numbers in California follow the following structure under the North American Numbering Plan:
Understanding the area code can help you determine if a call is local to your area. However, keep in mind that due to mobile number portability and VoIP services, the caller may be anywhere in the United States, so it’s best to search for the most recent phone number details.
