Is it legal to sell users' phone numbers?

Question

Law in IT

Let's say we have a website with a lot of people who signed up using their phone number.
And you checked that 400 phone numbers are working. Can they be sold for ringing with advertising?

Answer 1

The phone number is part of personal data, and if your agreement for the processing of PD did not contain a clause on transfer to third parties, then it is impossible.
If it was, you need to look to see if the advertisement is indicated for the purpose of this very transfer
. Just in case, double-check the Federal Law on personal data

Answer 2

No.

Answer 3

You can, if you want to explain yourself about the violation of PD