AS21301 UK-NATWEST-AS21301 Natwest Markets PLC
AS21301 is operated by UK-NATWEST-AS21301 Natwest Markets PLC and registered with RIPE NCC (GB) since 2001-10-24.
It announces 13 IPv4 and 0 IPv6 prefixes, 0% of them RPKI valid.
RIPE RIS sees 3 upstream and peer networks and 0 downstream networks next to it.
| Name | UK-NATWEST-AS21301 Natwest Markets PLC |
|---|---|
| Registry (RIR) | RIPE NCC |
| Country | United Kingdom (GB) |
| Delegated on | 2001-10-24 |
| Prefixes (IPv4 / IPv6) | 13 / 0 |
| RPKI valid | 0% (0 / 13) |
| Upstreams and peers | 3 |
| Downstream networks | 0 |
Routing health
- AS21301 announces 13 IPv4 and 0 IPv6 prefixes.
- No IPv6 prefixes announced.
- 13 announced prefixes are not covered by a ROA of AS21301 (they may have none, or another network’s).
- 3 upstreams and peers, 0 downstream networks seen.
For every check with the fix (IRR route objects, the RPKI state of each route, reverse DNS and the registration), run the full network report.
Announced prefixes 13
- 155.136.0.0/16
- 155.136.56.0/22
- 155.136.56.0/24
- 155.136.57.0/24
- 155.136.58.0/24
- 155.136.59.0/24
- 155.136.144.0/24
- 155.136.146.0/24
- 155.136.151.0/24
- 155.136.200.0/23
- 155.136.200.0/24
- 155.136.201.0/24
- 155.136.202.0/23
Upstreams and peers 3
The networks RIPE RIS sees next to AS21301 in BGP paths, the most visible first.
Peering
AS21301 is not in PeeringDB. Networks that peer at internet exchanges are expected to keep a record there with their policy, exchange addresses and contacts.
More about AS21301
Sources: RIR delegation data and PeeringDB (updated daily); routing from RIPEstat (RIPE NCC RIS and RPKI), refreshed daily. Routing data from 2026-11-15 23:37 UTC. The country is where the AS number was registered, not necessarily where the network operates.