Got a call from an unknown number in Richmond or elsewhere in Contra Costa County? Use our free lookup tool to identify any 341 or 510 number and check whether it has been reported as spam by other residents.
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Got a phone call or message from a Richmond phone number you don't recognize? Before you answer, call back, or reply, use our phone number lookup service to find out who called you.
California phone numbers use area codes 510. Select a code below to look up numbers starting with it.
According to the National Do Not Call Registry, California residents filed 287,916 complaints about unwanted calls in 2024:
Phone numbers reported to the FTC as unwanted calls by Richmond residents in the last 30 days.
Received a call from a business but aren't sure it's really them? Contra Costa County, according to U.S. Census Bureau data, includes 21,994 firms and 25,646 establishments employing 339,920 people.
| County | Percent of City | Firms | Establishments |
|---|---|---|---|
| Contra Costa | 100.00% | 21994 | 25646 |
Use our reverse lookup service to verify whether a number belongs to a legitimate local business, not scammers spoofing local numbers to gain your trust.
If you receive fraudulent calls or suspect a scam attempt, report it to reportfraud.ftc.gov or local police department using the following contacts:
Richmond has a population of 116448 people (median age of 37.20) - thousands of potential callers you might not recognize: neighbors, an old contact, or someone you actually want to talk to. Use our local white pages to find residents' phone numbers and addresses sourced from Contra Costa County, California state, and other public records.