Autonomous system
AS5491 OLSSON_NET
Unclassified RIPE
IPv4 addresses
256
1 prefixes
IPv6 prefixes
0
counted as prefixes, not addresses
Countries
1
mostly DK
Flagged prefixes
0
none
Summary
Olsson Net (Jan Olsson)
enterprise legacy
OLSSON_NET is a small independent network registered to Jan Olsson in
Vallensbæk, Denmark. It announces a single IPv4 /24 alongside IPv6.
What it's used for
- The operator's own hosts and services. Reverse DNS on the
/24resolves to names likefw-1.olsson.netandphone.olsson.net, so the space is in direct use rather than being sub-assigned to customers.
Notable
- One of the smaller networks in the low-AS range: a single
/24of IPv4, run with real transit and peering. Registry remarks list transit from the Danish research and education network and from Cibicom, plus IPv6 transit from Swipnet and Nianet. - The aut-num remarks carry a banner reading "AS5491 Internet since 1993" along with peering, routing, and NOC contact addresses - the presentation of a long-running, seriously operated network despite its size.
Interesting
- A reminder that an AS number says nothing about scale. AS5491 sits in the same numeric neighbourhood as national carriers and university networks while routing 256 addresses.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.
Address space
Summary
| Country | Name | Prefixes |
|---|---|---|
| DK | Denmark | 1 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS5491- Registry name
- OLSSON_NET
- Registrant
- OLSSON-MNT
- Abuse contact
- jan@olsson.net
- Registered
- 1970-01-01
- Last changed
- 2024-11-08
- Status
- active
Reputation
Classification and threat
Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.
No IC3 indicators Nothing from the FBI IC3 feed.
Threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere