It's been about a zillion years (well, OK it was 2017) when I last published a list of IPs belonging to 3NT Solutions LLP that you probably want to block. Their name came up yet again in something I was looking at, and I was slightly surprised to see that the old list was still somewhat valid. However a bit of research found some new ranges and some that have been potentially cleaned up.
Current
5.45.64.0/19
5.61.32.0/19
37.1.192.0/19
37.252.0.0/20
46.22.211.0/25
46.22.211.128/26
80.79.124.128/26
91.193.180.0/22
92.48.122.0/28
92.48.122.16/28
92.48.122.32/28
92.48.122.48/28
130.0.232.0/21
185.4.64.0/22
188.116.27.0/24
212.95.54.0/24
212.95.58.0/24
212.95.63.0/24
Potentially clean
95.168.165.0/24
95.168.173.0/24
95.168.177.0/24
95.168.178.0/24
95.168.191.0/24
184.154.38.40/29
