Autonomous system
AS206075 HOLLANDER-JACOBSEN Hollander & Jacobsen UG (haftungsbeschraenkt)
Unclassified RIPE
Summary
Hollander & Jacobsen
business germany small
HOLLANDER-JACOBSEN is operated by Hollander & Jacobsen UG (haftungsbeschraenkt).
What it's used for
- The address space carries internal corporate infrastructure, evidenced by reverse DNS entries such as
cloud.ffw-rd.de,heartbeat-2, andsto10.heart. - The AS announces 1024 IPv4 addresses across 4 prefixes and 2 IPv6 prefixes, while maintaining 18 observed neighbours.
- This ratio of a small, subdivided address inventory against a moderate number of peering relationships indicates an internal corporate estate with site-by-site segmentation rather than a public access or transit network.
Notable
- All four announced IPv4 prefixes share the netname pattern
DE-HOLLANDER-JACOBSENand list "Network Operations Center; Hollander & Jacobsen UG (haftungsbeschraenkt)" as the registrant, confirming consistent ownership. - The inventory consists of four distinct /24 blocks and two IPv6 prefixes, reflecting a fragmented but self-contained corporate address space.
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
Recorded at 2 exchanges in 2 countries, largest first.
| Exchange | Location | Their address |
|---|---|---|
| Speed Internet Exchange | Dronten, Netherlands | 185.1.223.33 |
| Sweden Open Network Internet eXchange Stockholm | Stockholm, Sweden | 185.1.215.98 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-11-05, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 4 prefixes · 1.02K addresses IPv6 2 prefixes
| Country | Name | Prefixes |
|---|---|---|
| DE | Germany | 6 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS206075- Registry name
- HOLLANDER-JACOBSEN
- Registrant
- lir-de-hollander-jacobsen-1-MNT
- Abuse contact
- abuse@hollander-jacobsen.de
- Registered
- 2017-03-29
- Last changed
- 2026-06-08
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 100% valid · 6 valid, 0 with no ROA
- ROAs
- 7 authorising AS206075
- ASPA
- 4 declared providers
- IRR
- 100% registered · 6 of 6 announcements
- Route objects
- 8 naming AS206075
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: 453 networks and 1,854 prefixes, as published 2026-11-06. 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