AS21235 — ADVANCED-SYSTEMHAUS ADVANCED Systemhaus GmbH

AS21235 announces 3 IPv4 prefixes covering 1,792 addresses and 1 IPv6 prefixes.

About this network

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.

Announced prefixes

• 185.65.4.0/22
• 193.108.193.0/24
• 194.49.64.0/23
• 2a03:16e0::/32

Upstream networks

• AS12731 IPHH Internet Port Hamburg GmbH
• AS174 Cogent Communications, LLC
• AS3257 GTT Communications Inc.

Adjacent networks

• AS12731 IPHH Internet Port Hamburg GmbH
• AS174 Cogent Communications, LLC
• AS3257 GTT Communications Inc.