AS51561 ICUK Computing Services Limited 🇬🇧 GB
Announcing 74 prefixes, seen at the RIS collectors.
IPv4 prefixes
72
80,128 (313 × /24)
IPv6 prefixes
2
1 × /32
Upstreams
6
transit providers observed
Peers
15
settlement-free adjacencies
Downstreams
2
transit customers observed
Customer cone
3
ASes reachable through it
Registry and operator data
- AS number
- AS51561
- Name
- ICUK Computing Services Limited
- Organisation
- ICUK Computing Services Ltd
- Country
- 🇬🇧 GB
- RIR
- RIPENCC
- Allocated
- 2010-09-28
- Network type
- NSP
- Scope
- Europe
- Peering policy
- Open
- IRR as-set
- AS-ICUK
- Website
- https://www.icuk.net/
- PeeringDB
- net/8468
- Exchanges
- 3
- Facilities
- 3
RPKI coverage of this AS
Its own announcements, validated against the current ROA set
Announced prefixes
74 in total
| Prefix | RPKI | Peers | Sample path | First seen |
|---|---|---|---|---|
| 2.56.84.0/22 v4 | no ROA | 43 | 3454951561 | 2026-09-18 |
| 5.133.168.0/23 v4 | no ROA | 43 | 3454951561 | 2026-09-18 |
| 5.133.170.0/23 v4 | no ROA | 43 | 3454951561 | 2026-09-18 |
| 5.254.162.0/23 v4 | no ROA | 43 | 3454951561 | 2026-09-18 |
| 5.254.164.0/23 v4 | no ROA | 43 | 3454951561 | 2026-09-18 |
| 37.235.43.0/24 v4 | no ROA | 43 | 3454951561 | 2026-09-18 |
| 45.93.112.0/22 v4 | no ROA | 43 | 3454951561 | 2026-09-18 |
| 45.93.112.0/23 v4 | no ROA | 47 | 345491333551561 | 2026-09-18 |
| 45.145.86.0/23 v4 | no ROA | 43 | 3454951561 | 2026-09-18 |
| 46.33.128.0/19 v4 | no ROA | 43 | 3454951561 | 2026-09-18 |
| 46.33.128.0/24 v4 | no ROA | 47 | 345491333551561 | 2026-09-18 |
| 46.33.130.0/24 v4 | no ROA | 43 | 5030051561 | 2026-09-18 |
| 46.33.156.0/24 v4 | no ROA | 43 | 5030051561 | 2026-09-18 |
| 46.102.192.0/19 v4 | no ROA | 43 | 3454951561 | 2026-09-18 |
| 46.102.192.0/24 v4 | no ROA | 47 | 345491333551561 | 2026-09-18 |
| 46.102.193.0/24 v4 | no ROA | 47 | 5030051561 | 2026-09-18 |
| 46.226.120.0/24 v4 | RPKI valid | 43 | 3454951561 | 2026-09-18 |
| 80.95.192.0/20 v4 | no ROA | 43 | 3454951561 | 2026-09-18 |
| 80.209.128.0/19 v4 | no ROA | 43 | 3454951561 | 2026-09-18 |
| 80.209.128.0/24 v4 | no ROA | 47 | 345491333551561 | 2026-09-18 |
| 80.209.155.0/24 v4 | no ROA | 43 | 37721335651561 | 2026-09-18 |
| 80.209.159.0/24 v4 | no ROA | 47 | 345491333551561 | 2026-09-18 |
| 80.209.160.0/20 v4 | no ROA | 43 | 3454951561 | 2026-09-18 |
| 80.209.176.0/21 v4 | no ROA | 43 | 3454951561 | 2026-09-18 |
| 80.209.184.0/22 v4 | no ROA | 43 | 3454951561 | 2026-09-18 |
| 80.209.188.0/23 v4 | no ROA | 42 | 3454951561 | 2026-09-18 |
| 80.209.190.0/23 v4 | no ROA | 42 | 3454951561 | 2026-09-18 |
| 80.247.216.0/24 v4 | RPKI valid | 43 | 3454951561 | 2026-09-18 |
| 82.39.142.0/24 v4 | RPKI valid | 43 | 3454951561 | 2026-09-18 |
| 89.107.24.0/22 v4 | no ROA | 43 | 3454951561 | 2026-09-18 |
| 91.233.33.0/24 v4 | no ROA | 43 | 3454951561 | 2026-09-18 |
| 138.124.128.0/20 v4 | no ROA | 43 | 3454951561 | 2026-09-18 |
| 138.124.128.0/24 v4 | no ROA | 43 | 5030051561 | 2026-09-18 |
| 138.124.134.0/24 v4 | no ROA | 43 | 5030051561 | 2026-09-18 |
| 138.124.135.0/24 v4 | no ROA | 43 | 5030051561 | 2026-09-18 |
| 138.124.136.0/24 v4 | no ROA | 43 | 5030051561 | 2026-09-18 |
| 138.124.137.0/24 v4 | no ROA | 43 | 5030051561 | 2026-09-18 |
| 138.124.138.0/24 v4 | no ROA | 43 | 5030051561 | 2026-09-18 |
| 138.124.142.0/24 v4 | no ROA | 43 | 5030051561 | 2026-09-18 |
| 181.215.32.0/24 v4 | RPKI valid | 42 | 3454951561 | 2026-09-18 |
| 185.2.236.0/22 v4 | no ROA | 43 | 3454951561 | 2026-09-18 |
| 185.32.55.0/24 v4 | no ROA | 43 | 3454951561 | 2026-09-18 |
| 185.35.148.0/22 v4 | no ROA | 48 | 3454951561 | 2026-09-18 |
| 185.35.148.0/24 v4 | no ROA | 43 | 34549291451561 | 2026-09-18 |
| 185.35.149.0/24 v4 | no ROA | 43 | 34549291451561 | 2026-09-18 |
| 185.35.150.0/24 v4 | no ROA | 43 | 34549291451561 | 2026-09-18 |
| 185.35.151.0/24 v4 | no ROA | 43 | 34549291451561 | 2026-09-18 |
| 185.132.52.0/24 v4 | no ROA | 43 | 3454951561 | 2026-09-18 |
| 185.137.240.0/24 v4 | no ROA | 47 | 345491333551561 | 2026-09-18 |
| 185.140.16.0/23 v4 | no ROA | 43 | 5030051561 | 2026-09-18 |
| 185.140.18.0/23 v4 | no ROA | 43 | 3454951561 | 2026-09-18 |
| 185.145.152.0/22 v4 | no ROA | 43 | 3454951561 | 2026-09-18 |
| 185.145.152.0/24 v4 | no ROA | 43 | 5030051561 | 2026-09-18 |
| 185.152.2.0/24 v4 | RPKI valid | 43 | 3454951561 | 2026-09-18 |
| 185.168.10.0/24 v4 | no ROA | 41 | 3454951561 | 2026-09-18 |
| 185.201.208.0/22 v4 | no ROA | 43 | 3454951561 | 2026-09-18 |
| 185.234.255.0/24 v4 | no ROA | 43 | 3454951561 | 2026-09-18 |
| 185.243.62.0/24 v4 | no ROA | 43 | 3454951561 | 2026-09-18 |
| 185.243.63.0/24 v4 | no ROA | 43 | 3454951561 | 2026-09-18 |
| 185.253.88.0/24 v4 | RPKI valid | 43 | 3454951561 | 2026-09-18 |
| 188.211.249.0/24 v4 | no ROA | 43 | 3454951561 | 2026-09-18 |
| 188.240.160.0/19 v4 | no ROA | 43 | 3454951561 | 2026-09-18 |
| 188.240.160.0/24 v4 | no ROA | 47 | 5030051561 | 2026-09-18 |
| 188.240.172.0/24 v4 | no ROA | 47 | 345491333551561 | 2026-09-18 |
| 188.240.173.0/24 v4 | no ROA | 47 | 345491333551561 | 2026-09-18 |
| 188.240.191.0/24 v4 | no ROA | 47 | 345491333551561 | 2026-09-18 |
| 193.161.9.0/24 v4 | RPKI valid | 43 | 3454951561 | 2026-09-18 |
| 193.161.10.0/24 v4 | RPKI valid | 43 | 3454951561 | 2026-09-18 |
| 193.187.0.0/24 v4 | no ROA | 43 | 3454951561 | 2026-09-18 |
| 205.157.160.0/19 v4 | no ROA | 43 | 3454951561 | 2026-09-18 |
| 205.157.160.0/24 v4 | no ROA | 47 | 345491333551561 | 2026-09-18 |
| 217.22.12.0/24 v4 | no ROA | 42 | 3454951561 | 2026-09-18 |
| 2a00:b900::/32 v6 | no ROA | 38 | 3454951561 | 2026-09-18 |
| 2a00:b900:2::/48 v6 | no ROA | 34 | 3454917451561 | 2026-09-18 |