Does the call blocker *67 or the call back *69 cost any money??

Question

i know dail *67 and *69 can hide my caller ID while i calling someone butdoes the call blocker *67 or the call back *69 cost any money??

Answer 1

*67 is always free, but *69 cost 95 cents unless you get if free with your phone-package!!

Answer 2

*69 costs each time you use it but i believe *67 doesn't cost .

Answer 3

Yes you probably have to subscribe to the service, but it also has to be available in your area.