| Serial | Label | Owner key | Owner | Description |
|---|---|---|---|---|
| 1665057615 (2022-10-06) | IPv4 network 172.21.88.144/28 | cb2d7f7227 | HOWARD-DN42 | Network for Machines in Mainland China |
| 1538911791 (2018-10-07) | IPv4 network 172.21.88.144/28 | cb2d7f7227 | HOWARD-DN42 | Network for Machines in Mainland China |