California
Area code 510 reported phone numbers
Area code 510 is assigned to California, with 785 prefixes in use held by 33 carriers and rate centers such as Okld Mn-pd, Hayward, Frnk Main, Okld Bkly, Okld Trnid, Richmond. Consumers have filed 1,125 complaints about 1,062 numbers in this area code, and 11 of those numbers have enough reports to get their own page.
1,062Reported numbers
1,125Complaints
641Complaints, last 30 days
Oct 21, 2026Last complaint
Most reported 510 numbers in the last 30 days
| Phone number | Last 30 days | Most reported topic |
|---|---|---|
| (510) 851-9556 | 5 | Dropped call or no message |
| (510) 254-3156 | 3 | Impostor calls |
| (510) 291-3483 | 3 | Not specified |
| (510) 312-4790 | 2 | Not specified |
| (510) 214-8862 | 2 | Other |
| (510) 240-8898 | 2 | Other |
| (510) 257-3218 | 2 | Home improvement & cleaning |
| (510) 439-5041 | 2 | Other |
| (510) 509-9816 | 2 | Other |
| (510) 529-4217 | 2 | Dropped call or no message |
| (510) 576-5027 | 2 | Not specified |
| (510) 624-3764 | 2 | Other |
| (510) 629-2621 | 2 | Other |
| (510) 681-2272 | 2 | Other |
| (510) 871-8348 | 2 | Dropped call or no message |
Scammers often fake caller IDs with local area codes (“neighbor spoofing”) so their calls look familiar. A local number on this list may be spoofed rather than owned by the caller.
All 510 numbers with repeated complaints
| Phone number | Complaints | Topic | Last reported |
|---|---|---|---|
| (510) 254-3156 | 3 | Impostor calls | Oct 20, 2026 |
| (510) 291-3483 | 3 | Not specified | Oct 15, 2026 |
| (510) 509-9816 | 2 | Other | Oct 14, 2026 |
| (510) 312-4790 | 3 | Not specified | Oct 9, 2026 |
| (510) 851-9556 | 5 | Dropped call or no message | Oct 8, 2026 |
| (510) 846-2638 | 3 | Other | Sep 19, 2026 |
| (510) 487-5105 | 3 | Impostor calls | Sep 11, 2026 |
| (510) 736-0001 | 3 | Other | Sep 10, 2026 |
| (510) 291-7005 | 3 | Not specified | Jun 16, 2026 |
| (510) 370-6872 | 3 | Not specified | Apr 10, 2025 |
| (510) 752-1190 | 3 | Not specified | Apr 2, 2025 |