Contact your mobile carrier and ask if they can trace or log the call
Enable call tracing features offered by your carrier, such as star codes where available
Save the date, time, and duration of each no-caller-ID call
Screenshot or record the call details from your phone’s call log
Use your phone’s built-in block and report features for unknown or private numbers
Ask your carrier for a call trace or nuisance call report
File a police report if the calls are threatening, harassing, or repeated
Request a subpoena or legal trace through law enforcement if needed
Use a call-blocking or spam-filtering app that logs private calls
Set your phone to silence unknown callers if you want to reduce interruptions
Contact your voicemail provider to check whether the caller left a message with identifying details
Keep all evidence, including voicemails, texts, and call logs
If the calls are from a business or institution, contact them directly and ask who placed the call
If you suspect scam or harassment, report the number pattern and details to your carrier and authorities