221.2.0.0/16 RPKI valid
Announced by AS4837 China Unicom Backbone.
Origin
| Origin AS | RPKI | Peers seeing it | Sample path | First seen | Last seen |
|---|---|---|---|---|---|
| AS4837 China Unicom Backbone | RPKI valid | 42 | 3454955114837 | 2026-09-18 | 2026-10-23 |
RPKI
1 ROA covers this prefix
| ROA prefix | Max length | Authorised origin | Trust anchor | Result for this route |
|---|---|---|---|---|
| 221.2.0.0/16 | /16 | AS4837 | apnic | authorises it |
Registry
Who this address space is delegated to, regardless of whether it is routed
- Delegated block
- 221.2.0.0/16
- RIR
- APNIC
- Country
- 🇨🇳 CN
- Status
- allocated
- Allocated
- 2002-12-24
Less specific routes
Announced prefixes that contain this one
Nothing less specific is announced.
More specific routes
10 announced prefixes inside this one
| Prefix | Origin | RPKI | Peers | First seen |
|---|---|---|---|---|
| 221.2.68.0/24 v4 | AS4837 China Unicom Backbone | RPKI valid | 42 | 2026-09-18 |
| 221.2.76.0/24 v4 | AS4837 China Unicom Backbone | RPKI valid | 42 | 2026-09-18 |
| 221.2.83.0/24 v4 | AS4837 China Unicom Backbone | RPKI valid | 41 | 2026-10-14 |
| 221.2.85.0/24 v4 | AS4837 China Unicom Backbone | RPKI valid | 42 | 2026-09-18 |
| 221.2.140.0/24 v4 | AS4837 China Unicom Backbone | RPKI valid | 42 | 2026-09-18 |
| 221.2.150.0/24 v4 | AS4837 China Unicom Backbone | RPKI valid | 42 | 2026-09-18 |
| 221.2.155.0/24 v4 | AS4837 China Unicom Backbone | RPKI valid | 42 | 2026-09-18 |
| 221.2.161.0/24 v4 | AS4837 China Unicom Backbone | RPKI valid | 42 | 2026-09-18 |
| 221.2.225.0/24 v4 | AS4837 China Unicom Backbone | RPKI valid | 42 | 2026-09-18 |
| 221.2.235.0/24 v4 | AS4837 China Unicom Backbone | RPKI valid | 42 | 2026-09-18 |