Autonomous system
AS8520 DUNKEL
Hosting APNIC
Summary
Dunkel (SITS Deutschland)
hosting enterprise legacy
DUNKEL is the network of Dunkel GmbH, a managed hosting, cloud and IT security provider based in Hattersheim near Frankfurt, close to the DE-CIX exchange. The AS is now registered to SITS Deutschland GmbH — Dunkel joined the Swiss IT Security Group, and the handle outlived the standalone company name.
What it's used for
- Managed cloud, hosting, storage and disaster-recovery services for German business customers, run out of Rhine-Main data centres.
- Managed email security: part of the space carries mail relays under
sec-provider.de, the front end of a secure-mail service. - About 10,000 addresses across four prefixes (
88.215.192.0/19is the bulk) plus an IPv6 /33.
Notable
- Every prefix is registered directly to the holder (
DUNKEL-NET-*netnames), so the scattered-looking inventory is a real operator's own space, not brokered address blocks. - Reverse DNS is sparse — most of the range answers nothing, and the names that do exist are first-party service hosts. That fits a managed-hosting estate where customer VMs sit behind the provider's own naming, and rules out any residential or eyeball use.
Interesting
- The proximity to DE-CIX is the whole pitch: a mid-sized German hoster selling data-residency and ISO-27001 compliance to customers who want their data to stay in Germany.
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 2 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS13237 | euNetworks GmbH | 278 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-18, 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 · 10.24K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| DE | Germany | 5 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS8520- Registry name
- DUNKEL
- Registrant
- DUNKEL-MNT
- Abuse contact
- ccs-abuse@sits-d.de
- Registered
- 2002-04-25
- Last changed
- 2021-02-17
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 40% valid · 2 valid, 3 with no ROA
- ROAs
- 2 authorising AS8520
- ASPA
- no ASPA record
- IRR
- 100% registered · 5 of 5 announcements
- Route objects
- 20 naming AS8520
Reputation
Classification and threat
Hosting Datacenter or cloud provider. Addresses are servers, not people.
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 1,784 prefixes, as published 2026-10-19. 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