AS5520 UNI-KOELN Universitaet zu Koeln
AS5520 is operated by UNI-KOELN Universitaet zu Koeln and registered with RIPE NCC (DE) since 1996-01-23.
It announces 6 IPv4 and 1 IPv6 prefixes, 100% of them RPKI valid.
RIPE RIS sees 1 upstream and peer networks and 0 downstream networks next to it.
| Name | UNI-KOELN Universitaet zu Koeln |
|---|---|
| Registry (RIR) | RIPE NCC |
| Country | Germany (DE) |
| Delegated on | 1996-01-23 |
| Prefixes (IPv4 / IPv6) | 6 / 1 |
| RPKI valid | 100% (7 / 7) |
| Upstreams and peers | 1 |
| Downstream networks | 0 |
Routing health
- AS5520 announces 6 IPv4 and 1 IPv6 prefixes.
- All 7 announced prefixes are RPKI valid.
- One upstream or peer seen (AS680): an outage there takes the whole network off the internet.
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 7
- 134.95.0.0/16
- 134.107.209.0/24
- 134.107.216.0/23
- 134.107.225.0/24
- 134.107.226.0/23
- 185.240.116.0/22
- 2a00:a200::/29
Upstreams and peers 1
The networks RIPE RIS sees next to AS5520 in BGP paths, the most visible first.
More about AS5520
Sources: RIR delegation data and PeeringDB (updated daily); routing from RIPEstat (RIPE NCC RIS and RPKI), refreshed daily. Routing data from 2026-11-14 07:28 UTC. The country is where the AS number was registered, not necessarily where the network operates.