To make a call with no caller ID (anonymous call), there are several common methods:

1. Use a specific phone code before dialing the number:

   • In the US, Canada, and Mexico, dial *67 before the number.
   • In many European countries, dial #31# before the number.
   • In other regions, the code varies but often includes *31# or 141 before the number.
     This way, your number shows as "No Caller ID" or "Private" to the recipient for that specific call.

2. Adjust phone settings to hide your caller ID:

   • On iPhone: Go to Settings > Phone > Show My Caller ID, then toggle it off.
   • On Android: Open the Phone app > Settings > Calls or Supplementary Services > Caller ID > select Hide Number or Never.
     This hides your number for all outgoing calls until toggled back on.

3. Use apps like Google Voice to hide caller ID options in their settings.

Note that in some cases, carriers may restrict caller ID blocking, and emergency or toll-free numbers cannot be blocked. Also, some people may not answer calls labeled as "No Caller ID" due to privacy concerns.