You generally cannot directly call back a private or blocked number
Check your phone’s recent calls for any available caller details
Contact your carrier and ask if they can trace the call
Use your carrier’s call return or call trace service if available
Dial *69 in some regions to try to return the last call
Use a call-blocking or caller-ID app that may identify hidden numbers
If the call was threatening or harassing, report it to law enforcement
Save the call time, date, and any voicemail for records