| 83.230.64.0/20 | Silesian University of Technology, Computer Centre | |
| 83.230.64.0/21 | Slaski Uniwersytet Medyczny w Katowicach | |
| 83.230.96.0/19 | Silesian University of Technology, Computer Centre | |
| 83.230.110.0/24 | Akademia Sztuk Pieknych w Katowicach | |
| 83.230.118.0/23 | Akademickie Centrum Informatyki | |
| 83.230.123.0/24 | Akademickie Centrum Informatyki | |
| 155.158.0.0/16 | PL 40-007 KATOWICE | |
| 157.158.0.0/16 | CKPOLSL - Silesian University of Technology, Computer Centre | |
| 91.220.103.0/24 | Silesian University of Technology, Computer Centre | |
| 212.106.176.0/20 | Silesian University of Technology, Computer Centre | |
| 212.106.183.0/24 | Akademickie Centrum Informatyki | |
| 212.106.184.0/22 | Akademickie Centrum Informatyki | |
| 213.227.80.0/20 | Silesian University of Technology, Computer Centre | |
| 213.227.88.0/21 | Uniwersytet Ekonomiczny w Katowicach | |
| 213.227.96.0/19 | Silesian University of Technology, Computer Centre | |