If you're calling from a home phone: dial 1831, or from a mobile: dial #31# then the number you are calling.
To unblock on a call-by-call basis (if your number is permanently blocked)
If you're calling from a home phone: dial 1832, or from a mobile: dial *31# then the number you are calling.
The above is just temporary blocking, to permanently block your numbers you’ll need to;
Home phones: Call us on 13 22 00 to discuss options for blocking your number on a permanent basis.
Mobile phones: Most mobiles include a "show my caller ID" setting which you can turn off. The location of this setting varies from mobile to mobile, but is usually located in Main Menu, then Tools or Settings, then Phone. For more information, please check your mobile phone manual.
Check if your telephone number is being displayed to callers
On a home phone, call 127 220 and listen to the announcement.
On a mobile phone, call *#31# then press thesend/call button,