$ query “AS2603” --type=asn → 1 result(s)
AS2603 — NORDUNET
NORDUnet
AS2603 is a mid-size transit provider registered to NORDUnet, based in Denmark since 2002. The network announces 9 728 IPv4 addresses. Supports IPv6.
- 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
- March 04, 2026
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
- 🇸🇪 SE (12 IPs), 🇩🇰 DK (7 IPs), 🇬🇧 GB (1 IPs)
- Prefix Changed
- March 04, 2026
Reputation
- Reputation
- Pristine — 0 flagged IPs out of 9 728 total (0.00%)
Connectivity Summary
- Upstream Providers
- 4 upstream autonomous systems providing transit
- Peers
- 138 autonomous systems exchanging traffic without transit fees
- Downstream Customers
- 12 downstream autonomous systems buying transit
- Degree
- 158 unique BGP neighbors (providers + customers + peers)
- Reach
- 182 — customer cone size measuring network influence
- Degree Rank
- #903
- Reach Rank
- #853
- Country Rank
- #2
Upstream Providers (4)
Prefix Lists
IPv4 Prefixes (10 total)
- 109.105.96.0/20 (4 096 addresses)
- 109.105.112.0/21 (2 048 addresses)
- 109.105.120.0/22 (1 024 addresses)
- 185.174.116.0/22 (1 024 addresses)
- 193.10.254.0/23 (512 addresses)
- 192.36.171.0/24 (256 addresses)
- 193.10.252.0/24 (256 addresses)
- 193.11.3.0/24 (256 addresses)
- 194.68.13.0/24 (256 addresses)
IPv6 Prefixes (2 total)
- 2001:948::/29