| Serial | Label | Owner key | Owner | Description |
|---|---|---|---|---|
| 1549911687 (2019-02-11) | IPv4 network 172.21.0.0/24 | cb2d7f7227 | Anycast services | |
| 1518602429 (2018-02-14) | IPv4 network 172.21.0.0/24 | cb2d7f7227 | HEXA-DN42 | Anycast services |
| 1512766809 (2017-12-08) | IPv4 network 172.21.0.0/24 | cb2d7f7227 | HEXA-DN42 | Anycast services |