Autonomous system
AS5520 UNI-KOELN
Education RIPE
Summary
Universität zu Köln
education university research legacy
UNI-KOELN is the Universitaet zu Koeln, the University of Cologne, one of Germany's largest and oldest universities. The AS carries the university's campus network.
What it's used for
- Campus networking for students, staff, faculties and the university's computing centre, plus research systems and institutional services.
- Roughly 68,000 IPv4 addresses, the sort of allocation a major German university received before address scarcity set in.
Notable
- This is a university network, not an ISP. The address space serves the institution's own people and machines, and its upstream is the German research and education networking world rather than a commercial carrier.
- German universities were early and generous recipients of address space, which is why a single campus can hold more IPv4 than many commercial providers.
Interesting
- The University of Cologne traces to 1388, making it one of the oldest universities in Central Europe. Its network is a good reminder that a lot of the early European internet was built out of university computing centres.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Transit providers
1 upstream, 0 downstream and 2 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS680 | Verein zur Foerderung eines Deutschen Forschungsnetzes e.V. | 406 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-11, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 6 prefixes · 68.10K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| DE | Germany | 7 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS5520- Registry name
- UNI-KOELN
- Registrant
- AS5520-MNT
- Abuse contact
- abuse@uni-koeln.de
- Registered
- 2002-02-04
- Last changed
- 2022-07-26
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 43% valid · 3 valid, 4 with no ROA
- ROAs
- 4 authorising AS5520
- ASPA
- no ASPA record
- IRR
- 86% registered · 6 of 7 announcements
- Route objects
- 8 naming AS5520
Reputation
Classification and threat
Education University, school or national research and education network.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 431 networks and 1,768 prefixes, as published 2026-10-12. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere