For TV, Books, Movies, etc, ACMA have allocated a series of fake phone numbers that can be used, that will not connect,
Check out this great Tom Scott video on the topic of fake phone numbers, for the why.
In Australia they are:
- Premium Rate Number 1900 654 321
- Central East (covering NSW and ACT) / (02) 5550 xxxx and (02) 7010 xxxx
- South East (covering VIC and TAS) / (03) 5550 xxxx and (03) 7010 xxxx
- North East (covering QLD) / (07) 5550 xxxx and (07) 7010 xxxx
- Central West (covering SA, WA and NT) / (08) 5550 xxxx and (08) 7010 xxxx
- Some (but not all) mobile starting with 0491 570 xxx
- Some (but not all) Freephone / Local rate starting with 1800 975 xxx