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AS1205University Linz

AustriaRegistryRIPE NCCTypeEyeball

As of 22nd October 2026, AS1205 (University Linz), an access network registered in Austria with RIPE NCC, originates 4 IPv4 prefixes covering 68.1k addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 3,211th-largest of the 79,655 networks we see originating IPv4, and the 20th-largest of 618 in Austria. It is seen behind 1 upstream network, most often AS1853 (ACONET). None of its announcements have a valid RPKI ROA. 100% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

4

IPv6 prefixes

1

IPv4 addresses

68.1k

IPv6 /64s

65.5k

Upstream graph

The networks AS1205 is seen behind, one and two hops out, drawn from real AS paths.

AS1205Toward the internet core
Upstream graph for AS1205: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS1205University LinzThis networkAS1853ACONETAS6939Hurricane Electri…AS21320GEANT Vereniging

Networks observed one and two hops upstream of AS1205 in real AS paths. A thicker line means more vantage points saw that adjacency, so weight tracks how well attested it is — not how much traffic it carries. Adjacency is an observation; whether it is a transit purchase or a settlement-free peering is an inference, and is labelled as one wherever we show it.

Neighbouring networks

2

adjacent networks

Upstreams
150%
Peers
150%
Downstreams
00%

Networks carrying this one's traffic toward the rest of the internet.

Upstreams of AS1205
NetworkCountryRelationshipPathsVantage pts
AS1853ACONETATPeer372141

Prefixes

The largest blocks AS1205 originates, widest first.

Largest prefixes originated by AS1205
PrefixAddressesVisibility
140.78.0.0/1665.5k77/77
193.186.172.0/221k77/77
193.186.176.0/221k77/77
192.107.124.0/2351277/77
2001:678:8d4::/4865.5k × /6464/64

Routing health

How AS1205's own announcements validate against RPKI and how far they propagate. The same measures for the whole routing table are on the routing table in numbers.

RPKI origin validation

  • Valid0.0%0
  • Invalid0.0%0
  • No ROA100.0%5

Propagation

  • Globally propagated90% of full-feed peers or more100.0%5
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 4 prefixes

IPv6 — 1 prefixes

  • /4865.5k × /64100.0%1

Recent changes

Announcements that started or stopped since 22nd Sept 2026.

No announcement by AS1205 started or stopped in this period.

Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.