AS8387 — T-SYSTEMS-AT Rennweg 97-99

AS8387 announces 14 IPv4 prefixes covering 91,648 addresses and 4 IPv6 prefixes.

About this network

T-SYSTEMS-AT is the Austrian network of Deutsche Telekom's corporate IT arm, registered today as Deutsche Telekom Global Business Solutions GmbH and long known as T-Systems Austria. The registry name is one of those that reads as a street address, Rennweg 97-99, which is simply the Vienna office.

What it's used for

• Managed ICT services for corporate and public-sector customers in Austria: hosting, managed WAN and remote-access services, and the systems T-Systems runs on their behalf. Reverse DNS across the space is full of t-systems.at service names, including management and dial-in infrastructure.
• Service infrastructure for the Deutsche Telekom group in Austria. Parts of the space resolve to t-mobile.at and to the s-budget-mobile.at MVNO, so the AS also carries operator-side systems rather than only customer workloads.

Notable

• This is a B2B and internal-services network, not an eyeball one. Magenta's Austrian consumer broadband and mobile subscribers live on other ASNs; the kind here follows what the AS actually carries, not the Telekom brand on the door.
• About 90,000 IPv4 addresses across a small number of prefixes, including a full legacy 164.3.0.0/16, which is a sign of an old allocation to the T-Systems predecessor rather than a modern assignment.

Interesting

• The handle preserves a company that no longer exists under that name. Deutsche Telekom retired the T-Systems brand for much of this business and rebranded it Global Business Solutions, but the AS handle and the reverse DNS both still say T-Systems, which is the usual way corporate renamings show up in routing data.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 46.17.224.0/21
• 92.61.208.0/20
• 164.3.0.0/16
• 185.49.176.0/22
• 193.46.45.0/24
• 193.162.45.0/24
• 194.247.47.0/24
• 207.244.212.0/24
• 212.31.64.0/19
• 212.95.17.0/24
• 212.166.96.0/19
• 213.162.64.0/23
• 213.162.78.0/24
• 216.120.174.0/23
• 2001:678:554::/48
• 2001:678:5a8::/48
• 2001:9d0::/32
• 2a10:f8c0::/29

Upstream networks

• AS1764 Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbH
• AS3320 Deutsche Telekom AG
• AS6939 Hurricane Electric LLC
• AS9002 RETN Limited
• AS3303 Swisscom (Schweiz) AG
• AS48362 Stadtwerke Feldkirch
• AS57463 NetIX Communications JSC
• AS33891 Core-Backbone GmbH
• AS15935 ha-vel internet s.r.o.
• AS13030 Init7 (Switzerland) Ltd.

Downstream networks

• AS214075 Spar Business Services GmbH
• AS43522 Austria Wirtschaftsservice GmbH
• AS205478 Best Gaming Technology GmbH
• AS35552 Kommunalkredit Austria AG
• AS211351 Deutsche Telekom Global Business Solutions GmbH
• AS203813 Spar Business Services GmbH

Adjacent networks

• AS1764 Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbH
• AS3320 Deutsche Telekom AG
• AS6939 Hurricane Electric LLC
• AS214075 Spar Business Services GmbH
• AS9002 RETN Limited
• AS43522 Austria Wirtschaftsservice GmbH
• AS205478 Best Gaming Technology GmbH
• AS35552 Kommunalkredit Austria AG
• AS3303 Swisscom (Schweiz) AG
• AS211351 Deutsche Telekom Global Business Solutions GmbH
• AS48362 Stadtwerke Feldkirch
• AS57463 NetIX Communications JSC
• AS33891 Core-Backbone GmbH
• AS203813 Spar Business Services GmbH
• AS15935 ha-vel internet s.r.o.
• AS13030 Init7 (Switzerland) Ltd.

Internet exchanges

• Vienna Internet Exchange — Vienna, Austria