How to hide phone number when making a call

Here’s how you can selectively withhold your phone number when making a call from a mobile. This causes your number to show up as “Private Number” or “Number Withheld” on the recipient’s handset.

To hide your number, just add the prefix #31# to the number you are dialing. For example, to call the number 0400777666 without revealing your own number, dial

     #31#0400777666

I’ve tested this on Vodafone and Optus in Australia, but it should work for other networks and countries as well.

If you’re dialing from a landline, try adding the prefix 1831 to the number you’re dialing

     18310400777666