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AS21320GEANT Vereniging

NetherlandsRegistryRIPE NCCTypeCarrier

As of 26th September 2026, AS21320 (GEANT Vereniging), a transit carrier registered in the Netherlands with RIPE NCC, originates 1 IPv4 prefix covering 2k addresses. By IPv4 address space that makes it the 25,306th-largest of the 79,516 networks we see originating IPv4, and the 364th-largest of 1,023 in the Netherlands. It is seen behind 17 upstream networks, most often AS2603 (NORDUnet) and AS3356 (Lumen (Level 3)), and in front of 39 downstream networks. 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

1

IPv6 prefixes

0

IPv4 addresses

2k

IPv6 /64s

0

Upstream graph

The networks AS21320 is seen behind, one and two hops out, drawn from real AS paths.

AS21320Toward the internet core
Upstream graph for AS21320: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS21320GEANT VerenigingThis networkAS174Cogent Communicat…AS2603NORDUnetAS3356Lumen (Level 3)AS18106Viewqwest Pte LtdAS32590Valve CorporationAS151326DCConnect Communi…AS3491PCCW Global (HK) …AS1299Arelion (fka. Tel…AS2914NTT America, Inc.AS3549Lumen (fka. Globa…AS215859Hetzner Cloud - S…AS6939Hurricane Electri…

Networks observed one and two hops upstream of AS21320 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

213

adjacent networks

Upstreams
178%
Peers
15774%
Downstreams
3918%

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

Upstreams of AS21320
NetworkCountryRelationshipPathsVantage pts
AS2603NORDUnetDKPeer24,272104
AS3356Lumen (Level 3)USPeer6,45266
AS174Cogent Communications, LLCUSPeer4,90652
AS32590Valve CorporationUSPeer3,6444
AS18106Viewqwest Pte LtdSGPeer3,0474
AS9002RETN LimitedGBPeer2,21514
AS13030Init7 (Switzerland) Ltd.CHPeer2,0544
AS8455atom86 BVNLPeer1,5562
AS6939Hurricane Electric LLCUSPeer1,02221
AS24940Hetzner Online GmbHDEPeer9692

Prefixes

The largest blocks AS21320 originates, widest first.

Largest prefixes originated by AS21320
PrefixAddressesVisibility
83.97.88.0/212k80/81

Routing health

How AS21320'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%1
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more100.0%1
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 1 prefixes

Recent changes

Announcements that started or stopped since 27th Aug 2026.

No announcement by AS21320 started or stopped in this period.

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