What do the blacklists, whitelists and red lists of telecom operators mean?

Blacklist refers to the list blocked and rejected by telecom operators because of intentional or unintentional or unreasonable terms.

A white list is a list of users with no bad records.

Red list, in some respects, is better than VIP. Operators will help you block all harassing calls and text messages and enjoy super-national treatment. The existence of "red list" means that operators condone and do nothing to harass spam messages. It's for profit. . . . Just to protect some heavyweight customers from harassment. Others, whoever you like.