This year we’ve shuffled teams’ IDs and will not show IPs on scoreboard. It’ll makes game harder for pros and changes nothing for newbies. Teams' IDs are pre-shuffled from 1 to 699 and we have full mapping, that will be shared after end of the game. During the game it's only up to teams to share or not share their ID/IP.

Question from WE_0WN_Y0U team: So since the IDs are randomized, can we somehow query which IDs are actually online/assigned? Cause otherwise we'd have to scan the net/attack the full range of possible IPs?
Answer: Yes, we’ll post the list of registered IPs right after registration closing on Slack, Telegram and on RuCTFE.org.