Use a blocked caller ID feature on your phone
Dial *67 before the number where supported
Turn off caller ID in your phone settings if available
Use a VoIP service that allows caller ID suppression
Contact your carrier to request caller ID blocking
Verify the call shows as private or unknown before placing it
Avoid leaving identifying voicemail messages
Do not use your personal number for the call
Use a secondary number if caller ID cannot be hidden
Check local laws and carrier rules before blocking caller ID