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	Prefix	Description
	213.156.224.0/20	Open Systems AG
	213.156.240.0/24	Open Systems AG
	213.156.241.0/24	Open Systems AG
	213.156.246.0/24	EXTRA-NET-ENX-246
	213.156.247.0/24	EXTRA-NET-ENX-246
	2a00:db0::/32	Open Systems AG

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Network Policy

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How are upstreams and downstreams calculated?

Upstreams

	ASN	Description	IPv4	IPv6
	AS174	Cogent Communications, LLC	✔	✔
	AS3356	Lumen (Level 3)	✔	✔
	AS13237	euNetworks GmbH	✔	✔
	AS6939	Hurricane Electric LLC	✘	✔
	AS3320	Deutsche Telekom AG	✔	✔
	AS58115	SwissIX Internet Exchange	✔	✔

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Peers

	ASN	Description	IPv4	IPv6
	AS174	Cogent Communications, LLC	✔	✔
	AS3356	Lumen (Level 3)	✔	✔
	AS6939	Hurricane Electric LLC	✔	✔
	AS13237	euNetworks GmbH	✔	✔
	AS5405	Inter.link GmbH	✔	✔
	AS33891	Core-Backbone GmbH	✔	✘
	AS3320	Deutsche Telekom AG	✔	✔
	AS24961	WIIT AG (fka. myLoc Managed IT AG)	✔	✔
	AS34019	Hivane Association	✔	✔
	AS25091	IP-Max SA	✔	✔
	AS58299	Openfactory GmbH	✔	✔
	AS8218	Zayo Europe	✔	✔
	AS47147	Anexia Cloud Solutions GmbH	✔	✘
	AS34927	iFog GmbH	✔	✔
	AS8298	IPng Networks GmbH	✔	✔
	AS9002	RETN Limited	✘	✔
	AS49544	i3D.net B.V	✔	✔
	AS58115	SwissIX Internet Exchange	✔	✔
	AS1764	Next Layer Telecommunications	✔	✔
	AS209823	Enki Multimedia EURL	✔	✔
	AS29075	IELO-LIAZO SERVICES SAS	✔	✘
	AS25581	GMG AG	✔	✘
	AS48362	Stadtwerke Feldkirch	✔	✔
	AS24482	SG.GS	✔	✔
	AS8801	Rocket Fibre Ltd	✔	✔
	AS49121	Infinity Telecom, s.r.o.	✔	✔
	AS39351	31173 Services AB	✔	✘
	AS56987	ABACLOUDA SAS	✔	✔
	AS215248	Bastiaan Mathijs Brink	✔	✔
	AS57777	Jeroen Massar	✔	✔
	AS4601	Antonios A. Chariton	✔	✔
	AS34177	CELESTE SAS	✔	✔
	AS202032	GOLINE SA	✔	✘
	AS31736	senseLAN GmbH	✔	✘
	AS198385	AlpineDC SA	✔	✘
	AS21215	UNITED GROUP NETWORK INFRASTRUCTURE d.o.o. Beograd	✔	✘
	AS34309	Link11 GmbH	✔	✘
	AS58057	Securebit AG	✔	✔
	AS12307	Sandro Bolliger trading as Bolliger Network Solutions	✔	✔
	AS36236	NetActuate, Inc	✔	✔
	AS1836	green.ch AG	✔	✔
	AS8758	Iway AG	✔	✘
	AS4455	IX Reach Ltd	✔	✘
	AS9009	M247 Europe SRL	✔	✘
	AS48971	DATAWIRE AG	✔	✘
	AS15576	NTS workspace AG	✔	✔
	AS15830	Equinix, Inc.	✔	✘
	AS57304	RETN Russia	✘	✔
	AS559	SWITCH	✘	✔
	AS61423	JMP Technology Services GmbH	✔	✘

aut-num:        AS9092
as-name:        OPENSYSTEMS-AS
descr:          Zurich, Switzerland
descr:          https://open-systems.com
org:            ORG-OSA1-RIPE
remarks:        For peering details see
remarks:        http://as9092.peeringdb.com/
remarks:
remarks:        We have an open peering policy and would like to peer with
remarks:        you. Please send requests to peering@open.ch.
remarks:
remarks:        NOC: support@open.ch
remarks:        Abuse: abuse@open.ch
remarks:
remarks:        -------------------------------------------------
remarks:        Peering Point Presence @TIX Zurich and @SWISSIX Zurich
remarks:        We have an open Peering-Policy (MD5 required)
remarks:        -------------------------------------------------
remarks:        Main Upstream/Transit Providers:
import:         from AS174 action pref=100; accept ANY
import:         from AS3320 action pref=100; accept ANY
import:         from AS13237 action pref=100; accept ANY
import:         from AS3356 action pref=100; accept ANY
export:         to AS174 announce AS-OPENSYSTEMS
export:         to AS3320 announce AS-OPENSYSTEMS
export:         to AS13237 announce AS-OPENSYSTEMS
export:         to AS3356 announce AS-OPENSYSTEMS
remarks:        -------------------------------------------------
remarks:        Direct Peerings:
import:         from AS9092:AS-TRANSIT accept ANY
import:         from AS9092:AS-PEERS accept AS9092:AS-SET:PeerAS
export:         to AS9092:AS-TRANSIT announce AS9092:AS-OPENSYSTEMS
export:         to AS9092:AS-PEERS announce AS9092:AS-OPENSYSTEMS
admin-c:        DUMY-RIPE
tech-c:         DUMY-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
remarks:        ------------------------------------------------
remarks:        We export the following prefixes:
remarks:        * 213.156.224.0/20
remarks:        * 213.156.240.0/21
remarks:        * 2a00:db0::/32
remarks:        ------------------------------------------------
remarks:        Contact Information
remarks:        * Operational issues: support@open.ch
remarks:        * Peering issues: peering@open.ch
remarks:        * Abuse and SPAM: abuse@open.ch
remarks:        ------------------------------------------------
mnt-by:         AS9092-MNT
created:        1970-01-01T00:00:00Z
last-modified:  2025-08-26T09:50:04Z
source:         RIPE
remarks:        ****************************
remarks:        * THIS OBJECT IS MODIFIED
remarks:        * Please note that all data that is generally regarded as personal
remarks:        * data has been removed from this object.
remarks:        * To view the original object, please query the RIPE Database at:
remarks:        * http://www.ripe.net/whois
remarks:        ****************************


organisation:   ORG-OSA1-RIPE
org-name:       Open Systems AG
country:        CH
org-type:       LIR
address:        Dummy address for ORG-OSA1-RIPE
mnt-ref:        AS9092-MNT
mnt-ref:        RIPE-NCC-HM-MNT
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         AS9092-MNT
abuse-c:        OSA40-RIPE
created:        2004-04-17T11:02:57Z
last-modified:  2025-02-03T13:12:36Z
source:         RIPE
# Email removed, Log into bgp.tools to see whois emails
remarks:        ****************************
remarks:        * THIS OBJECT IS MODIFIED
remarks:        * Please note that all data that is generally regarded as personal
remarks:        * data has been removed from this object.
remarks:        * To view the original object, please query the RIPE Database at:
remarks:        * http://www.ripe.net/whois
remarks:        ****************************

Last Update: 2026-03-11T03:23:47Z UTC

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Member of the following AS-SETs

-	Member	ASN Count
RIPE	as-telecom-peers	190
RIPE	as29097:as-hostpoint-swissix-ipv6-peers	29
RIPE	as30781:as-jaguar-peering-v6-swiss-ix	41092
RIPE	as42476:as-swissix-connected	241
RIPE	as-opensystems	1
LEVEL3	as-sprint-origins	7309
RIPE	as-liecomtel-peers	212
LEVEL3	as-lumen-customers-asns	10695
RIPE	as-eunch	40
RIPE	as9177:as-tsmchpeers	61451
RIPE	as29097:as-hostpoint-swissix-peers	49
RIPE	as-green-ipv6-cust	14
RIPE	as-jaguar-peering-v6-tix	7
RIPE	as25091:as-peers	284
LEVEL3	as-level3-origins-eu	0
RIPE	as-jaguar-peering-v6-swiss-ix	22
RIPE	as30781:as-jaguar-peering-swiss-ix	43343
LEVEL3	as-level3-origins-na	0
RIPE	as-green-cust	207
RADB	as-hurricanev6	20649