AS2603
NORDUnet — nordu.net
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Summary
| Country |
 Denmark
|
| Organization | NORDUnet |
| Domain | nordu.net |
| Number of IPv4 | 9,472 |
| Number of IPv6 | 7.1305× 1029 |
| AS Type | Education |
| Registry | RIPE NCC |
| Allocated | May 07, 2002 (about 23 years ago) |
| Updated | October 16, 2025 (about 22 days ago) |
IP Ranges
AS2603 announces 9 IPv4 ranges and 2 IPv6 ranges.
That's a total of 9,472 IPv4 addresses and 7.1305× 1029 IPv6 addresses.
| Prefix | Organization | Size | Registry | Status |
|---|---|---|---|---|
| 109.105.96.0/20 |
 Nordunet Core Backbone
|
4,096 | RIPE NCC | ASSIGNED PA |
| 109.105.112.0/21 |
Nordunet Services
|
2,048 | RIPE NCC | ASSIGNED PA |
| 109.105.120.0/22 |
NORDUnet
|
1,024 | RIPE NCC | ALLOCATED PA |
| 185.174.116.0/22 |
NORDUnet
|
1,024 | RIPE NCC | ASSIGNED PA |
| 192.36.171.0/24 |
NORDUnet
|
256 | RIPE NCC | LEGACY |
| 193.10.252.0/24 |
Nordunet Backbone
|
256 | RIPE NCC | ASSIGNED PA |
| 193.10.254.0/24 |
Nordunet Backbone
|
256 | RIPE NCC | ASSIGNED PA |
| 193.11.3.0/24 |
New Combined Nordunet/sunet Noc Network
|
256 | RIPE NCC | ASSIGNED PA |
| 194.68.13.0/24 |
NORDUnet
|
256 | RIPE NCC | ASSIGNED PA |
| Prefix | Organization | Size | Registry | Status |
|---|---|---|---|---|
| 2001:948::/29 |
Nordunet Infrastructure
|
6.3383× 1029 | RIPE NCC | ASSIGNED |
| 2001:948::/32 |
Nordunet Infrastructure
|
7.9228× 1028 | RIPE NCC | ASSIGNED |
Peers
AS2603 actively fosters the following peering relationships that enhance network performance through direct, settlement-free traffic exchange. Even with a modest number of peers, each connection serves as a strategic asset—optimizing routing, reducing latency, and minimizing transit costs.
Upstreams
AS2603 connects to the global Internet via at least 4 upstream providers. In this setup, AS2603 acts as a customer, subscribing to these transit services to obtain full BGP routing information and ensure reliable, redundant access to external networks.
Downstreams
AS2603 serves as a transit provider the following ASes, delivering the BGP routes needed for global connectivity. This downstream relationship underscores AS2603's role in extending Internet access beyond its own infrastructure.