AS9092 — OPENSYSTEMS-AS Zurich, Switzerland
AS9092 announces 3 IPv4 prefixes covering 5,120 addresses and 1 IPv6 prefixes.
About this network
AS9092 (OPENSYSTEMS-AS) is held by Open Systems AG, a Zurich-based managed security and networking company (Managed SASE/SD-WAN and MDR), founded 1990 and acquired by Swiss Post in 2024.
What it's used for
The AS backs Open Systems' own service infrastructure rather than a mass-market access network. It announces around 5,120 IPv4 addresses (mainly 213.156.224.0/20 and several /24s) plus an IPv6 prefix, with roughly 49 observed BGP neighbours. Sampled reverse DNS returns firewall/gateway names such as fw-i33-out.open.ch and fw-a13-out.open.ch, consistent with a security operator's managed-edge estate.
Notable
The space has been announced since 2000. The relatively high peering count for a small address footprint reflects a security-services company that connects to many customer and partner networks.
Interesting
The open.ch firewall PTR naming (fw-...-out) is a direct fingerprint of Open Systems' core business: it operates managed security gateways as a service for enterprises across many countries.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.
Announced prefixes
- 213.156.224.0/20
- 213.156.240.0/23
- 213.156.246.0/23
- 2a00:db0::/32
Upstream networks
- AS13237 euNetworks GmbH
- AS3356 Level 3 Parent, LLC
- AS6939 Hurricane Electric LLC
- AS174 Cogent Communications, LLC
- AS3320 Deutsche Telekom AG
- AS1836 green.ch AG
- AS24482 SG.GS
- AS48362 Stadtwerke Feldkirch
- AS34019 Hivane Association
- AS25091 IP-Max SA
Adjacent networks
- AS13237 euNetworks GmbH
- AS3356 Level 3 Parent, LLC
- AS6939 Hurricane Electric LLC
- AS174 Cogent Communications, LLC
- AS3320 Deutsche Telekom AG
- AS24482 SG.GS
- AS1836 green.ch AG
- AS48362 Stadtwerke Feldkirch
- AS34019 Hivane Association
- AS25091 IP-Max SA
Internet exchanges
- SwissIX — Zurich, Switzerland
- Equinix Internet Exchange Zurich — Zurich, Switzerland
awaiting query
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