AS2117 European Southern Observatory

European Southern Observatory · registered in Germany

IPv4 addresses20,4802 prefixes · <0.001% of announced IPv4

Rank in Germany#233largest network in DE by IPv4 space, of 2,315 · 0.02% of DE

Rank worldwide#6,081of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryGermany2,599 ASNs registered there

Open AS2117 in ASN lookup Look up an IP in this network (134.171.0.1) All networks in Germany

IPv4 prefixes

All 2 prefixes, in address order.

134.171.0.0/18
134.171.64.0/20

Similar-sized networks in Germany

ASNNameIPv4 addresses

AS34549#230 MEER-AS meerfarbig GmbH & Co. KG20,736

AS34788#231 NMM-AS Neue Medien Muennich GmbH20,736

AS49234#232 BDBOS-AS3 Bundesministerium des Innern und fuer Heimat20,736

AS20810#234 Netcom-Kassel Netcom Kassel Gesellschaft fuer Telekommunikation mbH20,224

AS50533#235 ITENOS I.T.E.N.O.S. International Telecom Network Operation Services GmbH19,968

AS16316#236 TMT TMT GmbH & Co. KG19,968

IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources