155.136.202.0/23 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 |
|---|---|---|---|---|---|
| AS21301 Natwest Markets PLC | no ROA | 30 | 37721127321301 | 2026-09-18 | 2026-09-30 |
| AS21054 Natwest Markets PLC | no ROA | 10 | 345492914127321054 | 2026-09-18 | 2026-09-30 |
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
- 155.136.0.0/16
- RIR
- RIPENCC
- Country
- 🇬🇧 GB
- Status
- assigned
- Allocated
- 1991-11-08
Less specific routes
Announced prefixes that contain this one
| Prefix | Origin | RPKI | Peers | Sample path | First seen |
|---|---|---|---|---|---|
| 155.136.128.0/17 v4 | AS21054 Natwest Markets PLC | no ROA | 42 | 3278721054 | 2026-09-18 |
| 155.136.0.0/16 v4 | AS21054 Natwest Markets PLC | no ROA | 40 | 37721127321054 | 2026-09-18 |
More specific routes
2 announced prefixes inside this one
| Prefix | Origin | RPKI | Peers | First seen |
|---|---|---|---|---|
| 155.136.202.0/24 v4 | AS21054 Natwest Markets PLC | no ROA | 42 | 2026-09-18 |
| 155.136.203.0/24 v4 | AS21054 Natwest Markets PLC | no ROA | 42 | 2026-09-18 |