151.186.172.0/24 RPKI valid 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 |
|---|---|---|---|---|---|
| AS36692 Cisco OpenDNS, LLC | RPKI valid | 41 | 226521650936692 | 2026-11-05 | 2026-11-07 |
| AS16509 Amazon.com, Inc. | RPKI valid | 1 | 3333332016509 | 2026-09-18 | 2026-11-07 |
RPKI
6 ROAs cover this prefix
| ROA prefix | Max length | Authorised origin | Trust anchor | Result for this route |
|---|---|---|---|---|
| 151.186.172.0/24 | /24 | AS14618 | ripe | wrong origin |
| 151.186.172.0/24 | /24 | AS16509 | ripe | wrong origin |
| 151.186.172.0/24 | /24 | AS36692 | ripe | authorises it |
| 151.186.172.0/22 | /24 | AS14618 | ripe | wrong origin |
| 151.186.172.0/22 | /24 | AS16509 | ripe | wrong origin |
| 151.186.172.0/22 | /24 | AS36692 | ripe | authorises it |
Registry
Who this address space is delegated to, regardless of whether it is routed
- Delegated block
- 151.186.0.0/16
- RIR
- RIPENCC
- Country
- 🇺🇸 US
- Status
- assigned
- Allocated
- 1991-09-17
Less specific routes
Announced prefixes that contain this one
Nothing less specific is announced.
More specific routes
0 announced prefixes inside this one
Nothing more specific is announced.
Recorded changes
| When | Change | Origin | Path |
|---|---|---|---|
| 2026-11-04 18:34:57Z | origin change | AS16509 → AS36692 | 4818529141650936692 |
| 2026-11-04 18:34:56Z | origin change | AS36692 → AS16509 | 48185335617416509 |
| 2026-11-04 18:34:42Z | origin change | AS16509 → AS36692 | 1328251741650936692 |
| 2026-11-04 18:34:37Z | origin change | AS36692 → AS16509 | 48185335617416509 |
| 2026-11-04 18:34:34Z | origin change | AS16509 → AS36692 | 494324836290021650936692 |
| 2026-11-04 18:34:32Z | origin change | AS36692 → AS16509 | 48185335617416509 |
| 2026-11-04 18:34:26Z | origin change | AS16509 → AS36692 | 216285828067621741650936692 |
| 2026-11-04 18:34:24Z | origin change | AS16509 → AS36692 | 5572029141650936692 |
| 2026-11-04 18:34:23Z | origin change | AS36692 → AS16509 | 2162858280676217416509 |
| 2026-11-04 18:34:17Z | origin change | AS16509 → AS36692 | 1383097133561650936692 |
| 2026-11-04 18:34:16Z | origin change | AS36692 → AS16509 | 3549335616509 |
| 2026-11-04 18:34:16Z | origin change | AS36692 → AS16509 | 2023655067317416509 |
| 2026-11-04 18:34:15Z | origin change | AS16509 → AS36692 | 496732048512991650936692 |
| 2026-11-04 18:34:13Z | origin change | AS36692 → AS16509 | 5805717416509 |
| 2026-11-04 18:34:12Z | origin change | AS16509 → AS36692 | 5030412991650936692 |
| 2026-11-04 18:34:10Z | origin change | AS36692 → AS16509 | 14907335616509 |
| 2026-11-04 18:34:09Z | origin change | AS16509 → AS36692 | 573814270812991650936692 |
| 2026-11-04 18:34:08Z | origin change | AS36692 → AS16509 | 13830971335616509 |
| 2026-11-04 18:34:07Z | origin change | AS16509 → AS36692 | 2040921989781741650936692 |
| 2026-11-04 18:34:06Z | origin change | AS36692 → AS16509 | 13830971335616509 |
| 2026-11-04 18:34:02Z | origin change | AS36692 → AS16509 | 4967312389129916509 |
| 2026-11-04 18:34:01Z | origin change | AS16509 → AS36692 | 2051412991650936692 |
| 2026-11-04 18:33:59Z | origin change | AS16509 → AS36692 | 580573454912991650936692 |
| 2026-11-04 18:33:56Z | origin change | AS36692 → AS16509 | 13830971335616509 |
| 2026-11-04 18:33:56Z | origin change | AS16509 → AS36692 | 70181650936692 |
| 2026-11-04 18:33:56Z | origin change | AS36692 → AS16509 | 34549645316509 |
| 2026-11-04 18:33:55Z | origin change | AS16509 → AS36692 | 38001747364611650936692 |
| 2026-11-04 18:33:53Z | origin change | AS16509 → AS36692 | 14035771650936692 |
| 2026-11-04 18:33:53Z | origin change | AS36692 → AS16509 | 46081221463716509 |
| 2026-11-04 18:33:50Z | origin change | AS16509 → AS36692 | 202051741650936692 |
| 2026-11-04 18:33:49Z | origin change | AS36692 → AS16509 | 3549335616509 |
| 2026-11-04 18:33:42Z | origin change | AS36692 → AS16509 | 140357716509 |
| 2026-11-04 18:33:41Z | origin change | AS16509 → AS36692 | 21324190021650936692 |
| 2026-11-04 18:33:41Z | origin change | AS36692 → AS16509 | 13282517416509 |
| 2026-11-04 18:33:38Z | origin change | AS16509 → AS36692 | 5991990021650936692 |
| 2026-11-04 18:33:37Z | origin change | AS16509 → AS36692 | 578211258632571650936692 |
| 2026-11-04 18:33:37Z | origin change | AS36692 → AS16509 | 599199002325716509 |
| 2026-11-04 18:33:36Z | origin change | AS16509 → AS36692 | 226521650936692 |
| 2026-11-04 18:33:36Z | origin change | AS16509 → AS36692 | 244821650936692 |
| 2026-11-04 18:33:36Z | origin change | AS36692 → AS16509 | 599199002325716509 |
| 2026-11-04 18:33:36Z | origin change | AS36692 → AS16509 | 4943248362129916509 |
| 2026-11-04 18:33:36Z | origin change | AS16509 → AS36692 | 491345335664241650936692 |
| 2026-11-04 18:33:36Z | origin change | AS36692 → AS16509 | 2448216509 |
| 2026-11-04 18:33:36Z | origin change | AS16509 → AS36692 | 61292244821650936692 |
| 2026-11-04 18:33:35Z | origin change | AS36692 → AS16509 | 2023655067317416509 |
| 2026-11-04 18:33:05Z | origin change | AS36692 → AS16509 | 2950439392129916509 |
| 2026-11-04 18:32:39Z | origin change | AS16509 → AS36692 | 1328251741650936692 |
| 2026-11-04 18:32:19Z | origin change | AS36692 → AS16509 | 3549335616509 |
| 2026-11-04 18:32:05Z | origin change | AS36692 → AS16509 | 50300291416509 |
| 2026-11-04 18:32:04Z | origin change | AS16509 → AS36692 | 4818512991650936692 |