Use *67 before dialing a number to hide your caller ID for that call
Turn off caller ID in your phone settings
Ask your carrier to block outgoing caller ID on your line
Use a secondary phone number or VoIP number
Use a calling app that supports number masking
Set your voicemail and messaging apps to avoid exposing your personal number
Use a burner phone or prepaid SIM for temporary privacy
Contact the recipient through a private messaging app instead of calling directly