To make a call with No Caller ID (i.e., to hide your number from the recipient), you can do the following:

• For a single call with No Caller ID, dial *67 before entering the area code and phone number you want to call. This blocks your caller ID for that call only

• To hide your caller ID for all calls:
  • On Android: Open the Phone app > Settings > Supplementary services or Calls > Caller ID > select "Hide number" or "Never"

* On iPhone: Go to Settings > Phone > Show My Caller ID > toggle it off

If you want to call back a number that appeared as No Caller ID, it is generally not possible to see or return the number directly because the caller intentionally blocked their information

. However, you can try:

• Dialing *69 immediately after the call to call back the last private number that called you. This may also unmask the number if your carrier supports it

• Using third-party caller ID apps like Truecaller or TrapCall that can sometimes reveal hidden numbers and allow you to call back

• Contacting your phone service provider to see if they can provide details about the No Caller ID call from their logs

In summary, to place a No Caller ID call, dial *67 before the number or change your phone settings to hide your caller ID permanently. To call back a No Caller ID, try *69 or third-party apps, but success depends on carrier support and privacy settings