155.136.144.0/24 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 | 31 | 3278721301 | 2026-09-18 | 2026-09-25 |
| AS21054 Natwest Markets PLC | no ROA | 11 | 380013278721054 | 2026-09-21 | 2026-09-25 |
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
0 announced prefixes inside this one
Nothing more specific is announced.
Recorded changes
| When | Change | Origin | Path |
|---|---|---|---|
| 2026-09-23 17:02:27Z | origin change | AS21054 → AS21301 | 8523278721301 |
| 2026-09-23 17:01:58Z | origin change | AS21301 → AS21054 | 8523278721054 |
| 2026-09-23 16:34:09Z | origin change | AS21054 → AS21301 | 3492712993278721301 |
| 2026-09-23 16:27:20Z | origin change | AS21301 → AS21054 | 3288403277271743278721054 |
| 2026-09-23 10:57:41Z | origin change | AS21054 → AS21301 | 377213278721301 |
| 2026-09-23 04:46:01Z | origin change | AS21301 → AS21054 | 70183278721054 |
| 2026-09-22 21:16:52Z | origin change | AS21054 → AS21301 | 5805718363278721301 |
| 2026-09-22 06:21:16Z | origin change | AS21054 → AS21301 | 377213278721301 |
| 2026-09-22 06:20:36Z | origin change | AS21301 → AS21054 | 3288403277271743278721054 |
| 2026-09-22 00:06:35Z | origin change | AS21301 → AS21054 | 3288403277271743278721054 |
| 2026-09-21 21:20:30Z | origin change | AS21054 → AS21301 | 5991990023278721301 |
| 2026-09-21 21:20:08Z | origin change | AS21301 → AS21054 | 216285828067623278721054 |
| 2026-09-21 19:45:47Z | origin change | AS21054 → AS21301 | 503043278721301 |
| 2026-09-21 19:45:16Z | origin change | AS21301 → AS21054 | 503043278721054 |
| 2026-09-21 18:24:21Z | origin change | AS21054 → AS21301 | 2051412993278721301 |
| 2026-09-21 18:24:14Z | origin change | AS21301 → AS21054 | 503043278721054 |
| 2026-09-21 18:06:27Z | origin change | AS21054 → AS21301 | 481853278721301 |
| 2026-09-21 18:06:16Z | origin change | AS21301 → AS21054 | 45049669629143278721054 |
| 2026-09-21 18:06:11Z | origin change | AS21054 → AS21301 | 5782112586325712733278721301 |
| 2026-09-21 18:05:46Z | origin change | AS21301 → AS21054 | 5782112586325712733278721054 |
| 2026-09-21 18:04:21Z | origin change | AS21054 → AS21301 | 2051412993278721301 |
| 2026-09-21 18:03:52Z | origin change | AS21301 → AS21054 | 2051412993278721054 |
| 2026-09-21 17:58:16Z | origin change | AS21054 → AS21301 | 45049669629143278721301 |
| 2026-09-21 17:58:02Z | origin change | AS21301 → AS21054 | 503003278721054 |
| 2026-09-21 17:57:46Z | origin change | AS21301 → AS21054 | 45049669629143278721054 |
| 2026-09-21 17:57:46Z | origin change | AS21054 → AS21301 | 377213278721301 |
| 2026-09-21 17:57:44Z | origin change | AS21054 → AS21301 | 481853278721301 |
| 2026-09-21 17:57:14Z | origin change | AS21301 → AS21054 | 206499345493278721054 |
| 2026-09-21 17:55:21Z | origin change | AS21054 → AS21301 | 2051412993278721301 |
| 2026-09-21 17:55:02Z | origin change | AS21301 → AS21054 | 503043278721054 |
| 2026-09-21 17:54:21Z | origin change | AS21054 → AS21301 | 2051412993278721301 |
| 2026-09-21 17:53:51Z | origin change | AS21301 → AS21054 | 2051412993278721054 |
| 2026-09-21 17:52:51Z | origin change | AS21054 → AS21301 | 2051412993278721301 |
| 2026-09-21 17:52:46Z | origin change | AS21301 → AS21054 | 45049669629143278721054 |
| 2026-09-21 17:52:41Z | origin change | AS21054 → AS21301 | 5782112586325712733278721301 |
| 2026-09-21 17:52:16Z | origin change | AS21301 → AS21054 | 5782112586325712733278721054 |
| 2026-09-21 17:09:52Z | origin change | AS21054 → AS21301 | 5782112586325712733278721301 |
| 2026-09-21 17:09:24Z | origin change | AS21301 → AS21054 | 5782112586325712733278721054 |
| 2026-09-21 17:01:00Z | origin change | AS21054 → AS21301 | 345493278721301 |
| 2026-09-21 17:00:31Z | origin change | AS21301 → AS21054 | 49432483623278721054 |
| 2026-09-21 14:45:35Z | origin change | AS21054 → AS21301 | 14033278721301 |
| 2026-09-21 09:16:02Z | origin change | AS21301 → AS21054 | 49432483623278721054 |