38.137.168.0/21 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 |
|---|---|---|---|---|---|
| AS174 Cogent Communications, LLC | no ROA | 37 | 34549174 | 2026-09-18 | 2026-10-29 |
| AS58327 FIBERGREEN TECNOLOGICAS S.L. | no ROA | 4 | 37721890358327 | 2026-09-18 | 2026-10-29 |
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
- 38.0.0.0/8
- RIR
- ARIN
- Country
- 🇺🇸 US
- Status
- allocated
- Allocated
- 1991-04-16
Less specific routes
Announced prefixes that contain this one
| Prefix | Origin | RPKI | Peers | Sample path | First seen |
|---|---|---|---|---|---|
| 38.0.0.0/8 v4 | AS174 Cogent Communications, LLC | no ROA | 42 | 34549174 | 2026-09-18 |
More specific routes
8 announced prefixes inside this one
| Prefix | Origin | RPKI | Peers | First seen |
|---|---|---|---|---|
| 38.137.168.0/24 v4 | AS174 Cogent Communications, LLC | no ROA | 41 | 2026-09-18 |
| 38.137.169.0/24 v4 | AS174 Cogent Communications, LLC | no ROA | 41 | 2026-09-18 |
| 38.137.170.0/24 v4 | AS174 Cogent Communications, LLC | no ROA | 41 | 2026-09-18 |
| 38.137.171.0/24 v4 | AS174 Cogent Communications, LLC | no ROA | 41 | 2026-09-18 |
| 38.137.172.0/24 v4 | AS174 Cogent Communications, LLC | no ROA | 41 | 2026-09-18 |
| 38.137.173.0/24 v4 | AS174 Cogent Communications, LLC | no ROA | 41 | 2026-09-18 |
| 38.137.174.0/24 v4 | AS174 Cogent Communications, LLC | no ROA | 41 | 2026-09-18 |
| 38.137.175.0/24 v4 | AS174 Cogent Communications, LLC | no ROA | 41 | 2026-09-18 |
Recorded changes
| When | Change | Origin | Path |
|---|---|---|---|
| 2026-10-28 08:26:15Z | origin change | AS58327 → AS174 | 460875751299174 |
| 2026-10-28 08:04:09Z | origin change | AS174 → AS58327 | 37721890358327 |
| 2026-10-26 02:40:12Z | origin change | AS58327 → AS174 | 328840327727174 |
| 2026-10-25 12:30:28Z | origin change | AS174 → AS58327 | 57821125863257890358327 |
| 2026-10-23 20:03:13Z | origin change | AS58327 → AS174 | 244826453174 |
| 2026-10-23 09:21:52Z | origin change | AS174 → AS58327 | 57821125863257890358327 |
| 2026-10-22 03:19:21Z | origin change | AS58327 → AS174 | 17639174 |
| 2026-10-21 21:59:35Z | origin change | AS174 → AS58327 | 2950439392338913569958327 |
| 2026-10-21 17:22:37Z | origin change | AS58327 → AS174 | 491345335664246461174 |
| 2026-10-21 16:11:38Z | origin change | AS174 → AS58327 | 612186939890358327 |
| 2026-10-20 14:43:46Z | origin change | AS58327 → AS174 | 460875751299174 |
| 2026-10-20 14:42:50Z | origin change | AS174 → AS58327 | 4608122146373257890358327 |
| 2026-10-20 14:12:13Z | origin change | AS58327 → AS174 | 460875751299174 |
| 2026-10-20 14:09:52Z | origin change | AS174 → AS58327 | 4608122146373257890358327 |
| 2026-10-19 11:39:29Z | origin change | AS58327 → AS174 | 13830971174 |
| 2026-10-19 09:46:11Z | origin change | AS174 → AS58327 | 37721890358327 |
| 2026-10-16 14:14:05Z | origin change | AS58327 → AS174 | 328840327727174 |
| 2026-10-16 10:33:23Z | origin change | AS174 → AS58327 | 612186939890358327 |