Autonomous system
AS5491 OLSSON_NET
Unclassified RIPE
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.
Interconnection
Peering at a glance
Internet exchanges
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Transit providers
1 upstream, 0 downstream and 1 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS1835 | IDDQD-AS | 59 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-25, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 1 prefixes · 256 addresses IPv6 0 prefixes
| 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
- Allocation
- allocated
Declared
PeeringDB profile
- Name
- Jan Olsson
- Scope
- Not Disclosed
- Traffic ratio
- Not Disclosed
- Website
- http://www.olsson.net
PeeringDB records are maintained by the network operator and are not independently verified. Treat them as a statement of intent rather than of fact. For the observed and recorded view, see peering, which lists the exchanges Packet Clearing House has a port on file for.
Routing security
RPKI and IRR
- RPKI
- 100% valid · 1 valid, 0 with no ROA
- ROAs
- 1 authorising AS5491
- ASPA
- no ASPA record
- IRR
- 100% registered · 1 of 1 announcements
- Route objects
- 2 naming AS5491
Reputation
Classification and threat
Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.
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: 443 networks and 1,779 prefixes, as published 2026-10-24. 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