$ query “AS2603” --type=asn → 1 result(s)
AS2603 · NORDUNET
NORDUnet
AS2603 belongs to NORDUnet and is a mid-size transit provider, based in Denmark since 2002. The system announces 9 728 IPv4 addresses, and supports IPv6. Most of its address space is geolocated to Sweden, with additional presence in Denmark and the United Kingdom.
- Top 5% — Top 5% of all autonomous systems by reach and degree
- #2 in Denmark — Top 10 by reach within country
Basic Information
- Country
- 🇩🇰 Denmark
- Category
- Hosting
- Network Role
- Mid-size Transit
- Data Origin
- Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
- Registered
- May 07, 2002
- Last Changed
- March 04, 2026
- Last Seen
- April 28, 2026 (active)
Prefix Summary
- IPv4 Prefixes (raw / aggregated)
- 10 / 9
- IPv6 Prefixes (raw / aggregated)
- 2 / 1
- IPv4 Addresses
- 9 728
- Largest IPv4 Prefix
- /20 (4 096 addresses)
- Largest IPv6 Prefix
- /29
- Geolocated Countries
- 🇸🇪 Sweden (9 216 IPs), 🇩🇰 Denmark (4 352 IPs), 🇬🇧 United Kingdom (256 IPs)
- Prefix Changed
- March 04, 2026
Reputation
- Reputation
- Pristine — 0 flagged IPs
Connectivity Summary
- Upstream Providers
- 4 upstreams providing transit
- Peers
- 144 networks exchanging traffic without transit
- Downstream Customers
- 12 downstreams buying transit
- Unclassified
- 6 unclassified BGP neighbors
- Degree
- 166 unique BGP neighbors
- Reach
- 181 networks in customer cone
Upstream Providers (4)
Prefix Lists
IPv4 Prefixes (10 total)
- 109.105.96.0/20 (4 096 addresses (/20 prefix))
- 109.105.112.0/21 (2 048 addresses (/21 prefix))
- 109.105.120.0/22 (1 024 addresses (/22 prefix))
- 185.174.116.0/22 (1 024 addresses (/22 prefix))
- 193.10.254.0/23 (512 addresses (/23 prefix))
- 192.36.171.0/24 (256 addresses (/24 prefix))
- 193.10.252.0/24 (256 addresses (/24 prefix))
- 193.11.3.0/24 (256 addresses (/24 prefix))
- 194.68.13.0/24 (256 addresses (/24 prefix))
IPv6 Prefixes (2 total)
- 2001:948::/29