202.121.0.0/16 no ROA MOAS
Announced by 2 different origins, which is either a deliberate multi-origin setup or a hijack.
This prefix is announced by more than one AS. Compare how many collector
peers see each origin below: a hijack is usually visible as a second
origin seen by far fewer peers than the legitimate one.
Origins
| Origin AS | RPKI | Peers seeing it | Sample path | First seen | Last seen |
|---|---|---|---|---|---|
| AS4538 China Education and Research Network Center | no ROA | 40 | 244824538 | 2026-09-18 | 2026-09-27 |
| AS24364 CERNET2 IX at Shanghai Jiaotong University | no ROA | 1 | 3822923855766023911453824364 | 2026-09-18 | 2026-09-27 |
RPKI
No ROA covers this prefix
No ROA covers this prefix, so origin validation returns "unknown". That is not a fault; most of the table is still unsigned.
Registry
Who this address space is delegated to, regardless of whether it is routed
- Delegated block
- 202.121.0.0/16
- RIR
- APNIC
- Country
- 🇨🇳 CN
- Status
- allocated
- Allocated
- 1995-09-21
Less specific routes
Announced prefixes that contain this one
| Prefix | Origin | RPKI | Peers | Sample path | First seen |
|---|---|---|---|---|---|
| 202.120.0.0/15 v4 | AS4538 China Education and Research Network Center | no ROA | 47 | 244824538 | 2026-09-18 |
More specific routes
35 announced prefixes inside this one
Recorded changes
| When | Change | Origin | Path |
|---|---|---|---|
| 2026-09-27 18:26:11Z | origin change | AS24364 → AS4538 | 852325764534538453845384538 |
| 2026-09-27 16:58:40Z | origin change | AS4538 → AS24364 | 3822923855766023911453824364 |
| 2026-09-25 17:02:54Z | origin change | AS24364 → AS4538 | 852325764534538453845384538 |
| 2026-09-25 17:00:12Z | origin change | AS4538 → AS24364 | 3822923855766023911453824364 |
| 2026-09-24 01:14:39Z | origin change | AS24364 → AS4538 | 333311032096545384538 |
| 2026-09-24 01:14:35Z | origin change | AS4538 → AS24364 | 333311032096523911453824364 |
| 2026-09-21 09:20:14Z | origin change | AS24364 → AS4538 | 46081221463764534538453845384538 |
| 2026-09-21 09:16:34Z | origin change | AS4538 → AS24364 | 4608757511537766023911453824364 |
| 2026-09-21 08:50:34Z | origin change | AS24364 → AS4538 | 46081221463764534538453845384538 |
| 2026-09-21 08:47:28Z | origin change | AS4538 → AS24364 | 4608757511537766023911453824364 |
| 2026-09-18 08:32:48Z | origin change | AS24364 → AS4538 | 333311032096545384538 |
| 2026-09-18 08:32:20Z | origin change | AS4538 → AS24364 | 333311032096523911453824364 |
| 2026-09-18 08:31:25Z | origin change | AS24364 → AS4538 | 3333125764534538453845384538 |
| 2026-09-18 08:29:35Z | origin change | AS4538 → AS24364 | 333311032096523911453824364 |
| 2026-09-18 05:23:24Z | origin change | AS24364 → AS4538 | 701864534538453845384538 |