There is an invitation-only list run by Jared Mauch called nsp-security
which has an extremely useful membership of enable-wielding ops people
who never sleep. It's very useful for things like "I am under attack
from address X.X.X.X which is in AS Y", infinitely more so than trying
to get action from remote NOCs through the front door.
It's a closed list, and you need to be recommended by people who are
already on the list before your subscription will be approved. I'd be
very happy to recommend anybody here who is interested (that I know).
Note that nsp-sec isn't a conversational list; it's a terse,
to-the-point, get-work-done list (unlike this one).