AS41230 ASK4 Ltd
AS41230 is operated by ASK4 Ltd and registered with RIPE NCC (GB) since 2006-07-05.
It announces 16 IPv4 and 7 IPv6 prefixes, 100% of them RPKI valid.
RIPE RIS sees 54 upstream and peer networks and 4 downstream networks next to it.
PeeringDB lists it as an NSP network at 6 internet exchanges and 8 facilities. Its peering policy is selective.
| Name | ASK4 Ltd |
|---|---|
| Registry (RIR) | RIPE NCC |
| Country | United Kingdom (GB) |
| Delegated on | 2006-07-05 |
| Network type | NSP, Europe |
| Peering policy | Selective |
| IRR as-set | AS-ASK4 |
| Prefixes (IPv4 / IPv6) | 16 / 7 |
| RPKI valid | 100% (23 / 23) |
| Upstreams and peers | 54 |
| Downstream networks | 4 |
| Website | ask4.com |
Routing health
- AS41230 announces 16 IPv4 and 7 IPv6 prefixes.
- All 23 announced prefixes are RPKI valid.
- 54 upstreams and peers, 4 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 23
- 31.205.0.0/16
- 31.205.64.0/18
- 31.205.192.0/18
- 45.81.120.0/22
- 45.154.248.0/22
- 78.109.176.0/20
- 81.23.48.0/20
- 176.119.145.0/24
- 185.134.128.0/22
- 185.134.136.0/22
- 185.134.136.0/23
- 185.134.138.0/24
- 185.134.139.0/24
- 185.134.144.0/22
- 185.198.228.0/22
- 213.143.0.0/19
- 2a0e:2a40::/29
- 2a0e:2ac0::/29
- 2a0e:5680::/29
- 2a0f:dd00::/29
- 2a00:1a10::/29
- 2a07:c300::/29
- 2a10:d00::/29
Upstreams and peers 54
The networks RIPE RIS sees next to AS41230 in BGP paths, the most visible first.
Peering
Peering policy: Selective. Suggested max-prefix limits: 450 IPv4, 200 IPv6. PeeringDB record
| Exchange | Ports | Speed | Route server |
|---|---|---|---|
| IXLeeds | 1 | 10G | Yes |
| LINX LON1: Main | 1 | 100G | Yes |
| LINX Manchester | 1 | 30G | Yes |
| LONAP: LON0 | 1 | 100G | Yes |
| MegaIX Dusseldorf | 1 | 10G | Yes |
| Facility | City | Country |
|---|---|---|
| ASK4 DC1 - Sheffield | Sheffield | GB |
| Digital Realty Dusseldorf DUS1-3 | Düsseldorf | DE |
| Digital Realty Frankfurt FRA1-27 | Frankfurt | DE |
| Equinix LD5 - London, Slough | Slough | GB |
| Equinix LD8 - London, Docklands | London | GB |
| Equinix MA1 - Manchester, Williams/Kilburn | Manchester | GB |
| Equinix MA4 - Manchester, Synergy House | Manchester | GB |
| Telehouse - London (Docklands North) | London | GB |
More about AS41230
Sources: RIR delegation data and PeeringDB (updated daily); routing from RIPEstat (RIPE NCC RIS and RPKI), refreshed daily. Routing data from 2026-11-13 18:50 UTC. The country is where the AS number was registered, not necessarily where the network operates.