170.10.142.0/24 RPKI valid MOAS
Announced by 5 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 |
|---|---|---|---|---|---|
| AS42427 Mimecast Services Limited | RPKI valid | 15 | 37721335642427 | 2026-09-18 | 2026-10-15 |
| AS39588 Mimecast Services Limited | RPKI valid | 14 | 34549646139588 | 2026-09-18 | 2026-10-15 |
| AS30031 Mimecast North America Inc | RPKI valid | 7 | 14907335630031 | 2026-09-18 | 2026-10-15 |
| AS136792 Mimecast Australia Pty Ltd | RPKI valid | 3 | 2448215830136792 | 2026-09-18 | 2026-10-15 |
| AS33538 Mimecast North America Inc | RPKI valid | 3 | 22652174335633538 | 2026-10-11 | 2026-10-15 |
RPKI
7 ROAs cover this prefix
| ROA prefix | Max length | Authorised origin | Trust anchor | Result for this route |
|---|---|---|---|---|
| 170.10.142.0/24 | /24 | AS30031 | arin | wrong origin |
| 170.10.142.0/24 | /24 | AS33538 | arin | wrong origin |
| 170.10.142.0/24 | /24 | AS37235 | arin | wrong origin |
| 170.10.142.0/24 | /24 | AS39588 | arin | wrong origin |
| 170.10.142.0/24 | /24 | AS42427 | arin | authorises it |
| 170.10.142.0/24 | /24 | AS60492 | arin | wrong origin |
| 170.10.142.0/24 | /24 | AS136792 | arin | wrong origin |
Registry
Who this address space is delegated to, regardless of whether it is routed
- Delegated block
- 170.10.128.0/19
- RIR
- ARIN
- Country
- 🇺🇸 US
- Status
- allocated
- Allocated
- 2020-01-10
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 |
|---|---|---|---|
| 2026-10-15 13:49:19Z | origin change | AS42427 → AS39588 | 49432483621764646139588 |
| 2026-10-15 09:20:56Z | origin change | AS30031 → AS42427 | 21628582806762291442427 |
| 2026-10-15 08:04:14Z | origin change | AS136792 → AS30031 | 3549335630031 |
| 2026-10-15 08:03:06Z | origin change | AS30031 → AS136792 | 46082411515830136792 |
| 2026-10-15 07:07:13Z | origin change | AS42427 → AS30031 | 13830971335630031 |
| 2026-10-15 06:35:57Z | origin change | AS30031 → AS42427 | 328840327727174335642427 |
| 2026-10-15 06:16:33Z | origin change | AS42427 → AS30031 | 13830971335630031 |
| 2026-10-15 00:10:00Z | origin change | AS39588 → AS42427 | 328840327727174335642427 |
| 2026-10-14 22:59:43Z | origin change | AS42427 → AS39588 | 57821125863257335639588 |
| 2026-10-14 05:41:59Z | origin change | AS33538 → AS42427 | 328840327727174335642427 |
| 2026-10-14 05:04:55Z | origin change | AS30031 → AS33538 | 202056939335633538 |
| 2026-10-14 04:34:09Z | origin change | AS39588 → AS30031 | 202056939335630031 |
| 2026-10-14 03:32:42Z | origin change | AS42427 → AS39588 | 37989563001321324657646139588 |
| 2026-10-13 13:54:44Z | origin change | AS39588 → AS42427 | 50300335642427 |
| 2026-10-13 13:54:33Z | origin change | AS30031 → AS39588 | 17639335639588 |
| 2026-10-13 13:53:58Z | origin change | AS30031 → AS39588 | 4504966962914335639588 |
| 2026-10-13 13:53:58Z | origin change | AS39588 → AS30031 | 557202914335630031 |
| 2026-10-13 13:53:54Z | origin change | AS39588 → AS30031 | 380013491335630031 |
| 2026-10-13 13:53:52Z | origin change | AS30031 → AS39588 | 557206939646139588 |
| 2026-10-13 13:53:40Z | origin change | AS39588 → AS30031 | 132825174335630031 |
| 2026-10-13 06:58:22Z | origin change | AS42427 → AS39588 | 57821125863257646139588 |
| 2026-10-13 01:16:20Z | origin change | AS39588 → AS42427 | 328840327727174335642427 |
| 2026-10-12 23:05:51Z | origin change | AS42427 → AS39588 | 4967312389335639588 |
| 2026-10-12 21:08:50Z | origin change | AS39588 → AS42427 | 328840327727174335642427 |
| 2026-10-12 20:49:27Z | origin change | AS42427 → AS39588 | 4967312389335639588 |
| 2026-10-12 15:02:19Z | origin change | AS39588 → AS42427 | 328840327727174335642427 |
| 2026-10-12 12:45:16Z | origin change | AS42427 → AS39588 | 57821125863257646139588 |
| 2026-10-12 01:06:14Z | origin change | AS42427 → AS39588 | 4967312389335639588 |
| 2026-10-11 10:26:46Z | origin change | AS33538 → AS42427 | 20409234019646142427 |
| 2026-10-11 08:13:04Z | origin change | AS30031 → AS33538 | 202056939335633538 |
| 2026-10-11 07:22:30Z | origin change | AS42427 → AS30031 | 202056939335630031 |
| 2026-10-11 06:52:59Z | origin change | AS39588 → AS42427 | 328840327727174335642427 |
| 2026-10-11 00:50:08Z | origin change | AS42427 → AS39588 | 496733216646139588 |
| 2026-10-10 23:42:27Z | origin change | AS39588 → AS42427 | 17639646142427 |
| 2026-10-10 23:19:28Z | origin change | AS42427 → AS39588 | 4943221551031543174335639588 |
| 2026-10-10 19:42:23Z | origin change | AS39588 → AS42427 | 328840327727174335642427 |
| 2026-10-10 00:30:47Z | origin change | AS39588 → AS42427 | 17639646142427 |
| 2026-10-09 23:58:21Z | origin change | AS42427 → AS39588 | 33331257646139588 |
| 2026-10-09 23:16:09Z | origin change | AS30031 → AS42427 | 17639646142427 |
| 2026-10-09 23:15:54Z | origin change | AS39588 → AS30031 | 557202914335630031 |
| 2026-10-09 23:15:24Z | origin change | AS30031 → AS39588 | 557202914335639588 |
| 2026-10-09 23:15:14Z | origin change | AS39588 → AS30031 | 132825335630031 |
| 2026-10-09 23:15:00Z | origin change | AS30031 → AS39588 | 557206939646139588 |
| 2026-10-09 23:14:54Z | origin change | AS39588 → AS30031 | 380013491335630031 |
| 2026-10-09 23:14:53Z | origin change | AS39588 → AS30031 | 557202914646130031 |
| 2026-10-09 23:14:52Z | origin change | AS30031 → AS39588 | 17639335639588 |
| 2026-10-09 23:14:51Z | origin change | AS136792 → AS39588 | 21628582806762335639588 |
| 2026-10-09 19:57:15Z | origin change | AS33538 → AS136792 | 443936407315830136792 |
| 2026-10-09 15:11:24Z | origin change | AS42427 → AS33538 | 349271299335633538 |
| 2026-10-09 15:08:30Z | origin change | AS39588 → AS42427 | 17639646142427 |