[nandomrumber]

0412 345 678

That was one number we were told to stop using at Internode. I heard similar stories from Optus and Telstra employees.

[tmtvl]

Someone I know who works at a telco (no idea if Vodafone is a thing in Belgium, but whatever: not Vodafone) was talking about a number someone has: 0411 11 11 11, and they got over a hundred operator messages every day.