Use the phone’s built-in caller ID or contact details if the number is in your contacts
Check the number in a reverse phone lookup service
Search the number online in search engines
Use your carrier’s caller ID or spam protection app
Ask the phone owner to share their live location
Use a messaging app with location sharing if you already have contact with them
Check social media profiles linked to the number
Contact local authorities if the situation involves safety or harassment
Report scam or spam numbers to your carrier or a spam database