asn.dev

Autonomous system

AS21235 ADVANCED-SYSTEMHAUS ADVANCED Systemhaus GmbH

Unclassified RIPE

IPv4 addresses 1.79K 3 prefixes
IPv6 prefixes 1 counted as prefixes, not addresses
Countries 1 mostly DE
Exchanges 0 recorded by PCH
Upstreams 3 0 downstream
Flagged prefixes 0 none

Summary

Advanced Systemhaus

Germany · AI-generated

business it-services germany

ADVANCED-SYSTEMHAUS is operated by Advanced Systemhaus GmbH, a Hamburg-based IT services provider.

What it's used for

  • The address space carries corporate and IT infrastructure traffic, evidenced by netnames DE-ADVANCED-HAMBURG-20140725 and DE-ADVANCED-HAMBURG-20010607, and reverse DNS entries like gw-185-65-6.0it.de and brd.vpn2dmz.hh.c-a-s.de.
  • With 1792 IPv4 addresses announced across 3 prefixes and only 3 observed neighbours, the low neighbour-to-address ratio indicates an internal corporate estate rather than a transit or access network.

Notable

  • Registrants largely align with the announcer, with ADVANCED Systemhaus GmbH holding two of the three prefixes; the third, 194.49.64.0/23, is registered to CAS Concepts and Solutions AG under netname CAS-NNET.
  • The inventory consists of three distinct IPv4 blocks and one IPv6 prefix, reflecting a segmented corporate address space with some third-party or legacy allocations.

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

Full topology · Graph

Internet exchanges

No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.

Transit providers

3 upstream, 0 downstream and 6 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS12731IPHH Internet Port Hamburg GmbH171
AS174Cogent Communications, LLC33
AS3257GTT Communications Inc.15

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-14, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.

Address space

Summary

Shape and geography

IPv4 3 prefixes · 1.79K addresses IPv6 1 prefixes

CountryNamePrefixes
DEGermany4

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS21235
Registry name
ADVANCED-SYSTEMHAUS
Registrant
ADVANCED-SYSTEMHAUS-MNT
Abuse contact
abuse@advanced.info
Registered
2001-10-04
Last changed
2021-03-14
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
75% valid · 3 valid, 1 with no ROA
ROAs
3 authorising AS21235
ASPA
no ASPA record
IRR
100% registered · 4 of 4 announcements
Route objects
4 naming AS21235

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: 442 networks and 1,772 prefixes, as published 2026-10-15. 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

Cross-check