Browse the Ontario phone book to find residents and businesses throughout San Bernardino County. If you received a call from an unrecognized number with area code 840 or 909, use our lookup tool to see who it belongs to before you call back.
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Find phone numbers for city businesses, public services, and organizations by category.
Got a phone call or message from a Ontario 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 909. 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 Ontario residents in the last 30 days.
+1 (502) 825-8408
Calls pretending to be government, businesses, or family and friends
2 reports ·
+1 (689) 302-2105
Other
1 report ·
+1 (424) 234-3471
Other
1 report ·
+1 (909) 345-9645
Other
1 report ·
+1 (731) 252-9806
Other
1 report ·
+1 (518) 570-2336
Other
1 report ·
+1 (930) 529-4105
Other
1 report ·
+1 (901) 640-0701
Other
1 report ·
+1 (949) 841-2003
Other
1 report ·
+1 (503) 282-0505
Other
1 report ·
Received a call from a business but aren't sure it's really them? San Bernardino County, according to U.S. Census Bureau data, includes 35,328 firms and 42,011 establishments employing 682,275 people.
| County | Percent of City | Firms | Establishments |
|---|---|---|---|
| San Bernardino | 100.00% | 35328 | 42011 |
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:
Ontario has a population of 175265 people (median age of 32.30) - 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 San Bernardino County, California state, and other public records.