Autonomous system
AS205790 DCSO-AS
Unclassified APNIC Enterprise
Summary
DCSO Deutsche Cyber-Sicherheitsorganisation GmbH
cybersecurity business enterprise germany
The AS handle is DCSO-AS, held by DCSO Deutsche Cyber-Sicherheitsorganisation GmbH.
What it's used for
- The address space carries corporate infrastructure for a cybersecurity services firm, with reverse DNS entries following the pattern
b9b77e80.ip.as205790.net. - The network announces 512 IPv4 addresses across 1 prefix and 2 IPv6 prefixes, while maintaining 11 observed neighbours; this ratio indicates a business network with moderate peering rather than a transit or large-scale access provider.
- Traffic from this AS consists of office workers, web/API endpoints, and internal systems for a Berlin-based IT consulting and cyber security company.
Notable
- Registrants align with the announcer, listing DCSO Deutsche Cyber-Sicherheitsorganisation GmbH NOC, the main entity, and an Abuse-C Role.
- The address inventory is compact, consisting of a single /23 IPv4 block and two IPv6 prefixes, consistent with a single corporate site or small internal estate.
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 1 exchange in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| Berlin Commercial Internet Exchange | Berlin, Germany | 193.178.185.133 |
Transit providers
7 upstream, 0 downstream and 12 adjacent networks observed; most-used upstreams first.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-31, 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 · 512 addresses IPv6 2 prefixes
| Country | Name | Prefixes |
|---|---|---|
| DE | Germany | 3 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS205790- Registry name
- DCSO-AS
- Registrant
- DCSO-MNT
- Abuse contact
- abuse@dcso.de
- Registered
- 2017-06-02
- Last changed
- 2018-09-04
- Allocation
- allocated
Declared
PeeringDB profile
- Name
- DCSO
- Also known as
- DCSO Deutsche Cyber-Sicherheitsorganisation GmbH
- Network type
- Enterprise
- Scope
- Europe
- Traffic ratio
- Balanced
- Peering policy
- Selective
- IRR as-set
AS205790- Present at
- 1 exchanges
- Website
- https://dcso.de
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 · 4 valid, 0 with no ROA
- ROAs
- 4 authorising AS205790
- ASPA
- no ASPA record
- IRR
- 100% registered · 4 of 4 announcements
- Route objects
- 5 naming AS205790
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: 447 networks and 1,843 prefixes, as published 2026-11-01. 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