| Serial | Label | Owner key | Owner | Description |
|---|---|---|---|---|
| 1549911687 (2019-02-11) | IPv4 network 172.21.121.64/27 | cb2d7f7227 | TIMK-DN42 | |
| 1507431611 (2017-10-08) | IPv4 network 172.21.121.64/27 | cb2d7f7227 | IO-DN42 | Skynet obsolete network, will be dropped as soon as all routes are flushed. |
| 1507395614 (2017-10-07) | IPv4 network 172.21.121.64/27 | cb2d7f7227 | IO-DN42 | Skynet IPv4 main network |