subnet.im

AS8643NATIONAL AND KAPODISTRIAN UNIVERSITY OF ATHENS

GreeceRegistryRIPE NCC

As of 24th October 2026, AS8643 (NATIONAL AND KAPODISTRIAN UNIVERSITY OF…), a network registered in Greece with RIPE NCC, originates 4 IPv4 prefixes covering 51.7k addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 4,375th-largest of the 79,664 networks we see originating IPv4, and the 17th-largest of 226 in Greece. It is seen behind 1 upstream network, most often AS5408 (National Infrastructures for Research…). Every one of its announcements has a valid RPKI ROA, and none are RPKI-invalid. 100% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

4

IPv6 prefixes

1

IPv4 addresses

51.7k

IPv6 /64s

65.5k

Upstream graph

The networks AS8643 is seen behind, one and two hops out, drawn from real AS paths.

AS8643Toward the internet core
Upstream graph for AS8643: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS8643NATIONAL AND KAPO…This networkAS5408National Infrastr…AS3491PCCW Global (HK) …AS21320GEANT Vereniging

Networks observed one and two hops upstream of AS8643 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 AS8643
NetworkCountryRelationshipPathsVantage pts
AS5408National Infrastructures for Research and Technology S.A.GRPeer366138

Prefixes

The largest blocks AS8643 originates, widest first.

Largest prefixes originated by AS8643
PrefixAddressesVisibility
88.197.0.0/1732.8k76/76
195.134.64.0/1816.4k76/76
87.239.232.0/212k76/76
195.130.64.0/2351276/76
2001:648:2010::/4865.5k × /6462/63

Routing health

How AS8643'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

  • Valid100.0%5
  • Invalid0.0%0
  • No ROA0.0%0

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 24th Sept 2026.

No announcement by AS8643 started or stopped in this period.

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