183.174.0.0/16 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 | 13 | 244824538 | 2026-09-18 | 2026-10-07 |
| AS24349 CERNET2 IX at Peking University | no ROA | 2 | 3822923855766023911453824349 | 2026-09-18 | 2026-10-07 |
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
- 183.172.0.0/14
- RIR
- APNIC
- Country
- 🇨🇳 CN
- Status
- allocated
- Allocated
- 2009-11-25
Less specific routes
Announced prefixes that contain this one
| Prefix | Origin | RPKI | Peers | Sample path | First seen |
|---|---|---|---|---|---|
| 183.172.0.0/14 v4 | AS4538 China Education and Research Network Center | no ROA | 47 | 244824538 | 2026-09-18 |
More specific routes
2 announced prefixes inside this one
| Prefix | Origin | RPKI | Peers | First seen |
|---|---|---|---|---|
| 183.174.0.0/17 v4 | AS4538 China Education and Research Network Center | no ROA | 4 | 2026-09-18 |
| 183.174.128.0/17 v4 | AS4538 China Education and Research Network Center | no ROA | 4 | 2026-09-18 |
Recorded changes
| When | Change | Origin | Path |
|---|---|---|---|
| 2026-10-03 09:14:04Z | origin change | AS24349 → AS4538 | 37721693946354538 |
| 2026-10-02 11:36:43Z | origin change | AS4538 → AS24349 | 46087575244902448923911453824349 |
| 2026-10-02 07:43:34Z | origin change | AS24349 → AS4538 | 333311032096545384538 |
| 2026-10-01 17:00:25Z | origin change | AS4538 → AS24349 | 333311032096523911453824349 |
| 2026-09-27 20:03:16Z | origin change | AS24349 → AS4538 | 333311032096545384538 |
| 2026-09-27 16:58:41Z | origin change | AS4538 → AS24349 | 3822923855766023911453824349 |
| 2026-09-27 03:52:55Z | origin change | AS24349 → AS4538 | 1763946354538 |
| 2026-09-25 17:00:13Z | origin change | AS4538 → AS24349 | 3822923855766023911453824349 |
| 2026-09-24 01:14:39Z | origin change | AS24349 → AS4538 | 333311032096545384538 |
| 2026-09-23 23:07:58Z | origin change | AS4538 → AS24349 | 3333110320965244902448923911453824349 |