Autonomous system
AS2603 NORDUNET
Education RIPE
Summary
NORDUnet
education research nren
The Nordic regional research and education backbone, interconnecting the national NRENs of Denmark, Finland, Iceland, Norway, and Sweden and linking them to the global research-network community.
What it's used for
- Carrying traffic between the Nordic national research networks and onward to GÉANT, Internet2, and other international R&E backbones, serving universities and research institutions across the region.
Notable
- Addresses here are institutional research-and-education backbone infrastructure, not commercial hosting — classified
educationeven though it operates like a large carrier. The wide prefix footprint reflects its role aggregating five national networks.
Interesting
- NORDUnet is jointly owned by the five Nordic NRENs and is one of the oldest international research-network cooperations, with roots in the 1980s.
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
Recorded at 25 exchanges in 14 countries, largest first.
| Exchange | Location | Their address |
|---|---|---|
| DE-CIX Frankfurt | Frankfurt, Germany | 80.81.192.241 |
| LINX LON1 | London, United Kingdom | 195.66.225.24 |
| AMS-IX Amsterdam | Amsterdam, Netherlands | 80.249.209.203 |
| Neutral Internet Exchange | Amsterdam, Netherlands | 193.239.116.53 |
| Equinix Internet Exchange Ashburn | Ashburn, United States | 206.126.236.230 |
| London Network Access Point | London, United Kingdom | 5.57.80.168 |
| Hong Kong Internet Exchange | Hong Kong, China | 123.255.91.213 |
| JPIX Tokyo | Tokyo, Japan | 210.171.225.238 |
Transit providers
37 upstream, 13 downstream and 90 adjacent networks observed; most-used upstreams first.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-13, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 9 prefixes · 9.73K addresses IPv6 13 prefixes
| Country | Name | Prefixes |
|---|---|---|
| DK | Denmark | 22 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS2603- Registry name
- NORDUNET
- Registrant
- NORDUNET-MNT
- Abuse contact
- abuse@nordu.net
- Registered
- 2002-05-07
- Last changed
- 2026-09-25
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 83% valid · 10 valid, 2 with no ROA
- ROAs
- 14 authorising AS2603
- ASPA
- no ASPA record
- IRR
- 92% registered · 11 of 12 announcements 1 other origin
- Route objects
- 15 naming AS2603
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: 436 networks and 1,771 prefixes, as published 2026-10-13. 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