subnet.im

AS5408National Infrastructures for Research and Technology S.A.

GreeceRegistryRIPE NCCTypeEyeball

As of 24th October 2026, AS5408 (National Infrastructures for Research…), an access network registered in Greece with RIPE NCC, originates 39 IPv4 prefixes covering 252k addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 1,127th-largest of the 79,664 networks we see originating IPv4, and the 5th-largest of 226 in Greece. It is seen behind 4 upstream networks, most often AS21320 (GEANT Vereniging) and AS3491 (PCCW Global (HK) Ltd.), and in front of 30 downstream networks. 85% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 75% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

39

IPv6 prefixes

1

IPv4 addresses

252k

IPv6 /64s

34.4B

Upstream graph

The networks AS5408 is seen behind, one and two hops out, drawn from real AS paths.

AS5408Toward the internet core
Upstream graph for AS5408: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS5408National Infrastr…This networkAS3491PCCW Global (HK) …AS13335Cloudflare, Inc.AS20965GEANT VerenigingAS21320GEANT VerenigingAS24516Virtutel Pty LtdAS58511Swoop (Anycast Gl…AS2914NTT America, Inc.AS6453TATA Communicatio…AS293ESnetAS11537Internet2AS2603NORDUnetAS3356Lumen (Level 3)

Networks observed one and two hops upstream of AS5408 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

72

adjacent networks

Upstreams
46%
Peers
3853%
Downstreams
3042%

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

Upstreams of AS5408
NetworkCountryRelationshipPathsVantage pts
AS21320GEANT VerenigingNLPeer9,179132
AS3491PCCW Global (HK) Ltd.HKPeer4669
AS13335Cloudflare, Inc.USPeer29775
AS20965GEANT VerenigingNLPeer2512

Prefixes

All 40

The largest blocks AS5408 originates, widest first.

Largest prefixes originated by AS5408
PrefixAddressesVisibility
83.212.0.0/1665.5k76/76
195.251.0.0/1665.5k76/76
37.32.128.0/1732.8k76/76
150.140.128.0/1732.8k76/76
62.217.64.0/1816.4k76/76
195.130.64.0/1816.4k76/76
194.177.192.0/198.2k76/76
143.233.184.0/221k76/76
185.5.76.0/221k76/76
185.81.196.0/221k76/76

Routing health

How AS5408'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

  • Valid85.0%34
  • Invalid0.0%0
  • No ROA15.0%6

Propagation

  • Globally propagated90% of full-feed peers or more75.0%30
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%25.0%10

Prefix sizes

IPv4 — 39 prefixes

IPv6 — 1 prefixes

  • /2934.4B × /64100.0%1

Recent changes

Announcements that started or stopped since 24th Sept 2026.

11 announced and 11 withdrawn in all; the most recent are shown.

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