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AS1104Nikhef - Dutch National Institute for Sub-atomic Physics

NetherlandsRegistryRIPE NCCTypeEyeball

As of 22nd October 2026, AS1104 (Nikhef - Dutch National Institute for…), an access network registered in the Netherlands with RIPE NCC, originates 14 IPv4 prefixes covering 78.6k addresses and 5 IPv6 prefixes. By IPv4 address space that makes it the 2,807th-largest of the 79,655 networks we see originating IPv4, and the 39th-largest of 1,021 in the Netherlands. It is seen behind 4 upstream networks, most often AS1103 (SURF B.V.) and AS49544 (i3D.net B.V). Every one of its announcements has a valid RPKI ROA, and none are RPKI-invalid. 84% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

14

IPv6 prefixes

5

IPv4 addresses

78.6k

IPv6 /64s

8.6B

Upstream graph

The networks AS1104 is seen behind, one and two hops out, drawn from real AS paths.

AS1104Toward the internet core
Upstream graph for AS1104: 11 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS1104Nikhef - Dutch Na…This networkAS1103SURF B.V.AS8298IPng Networks GmbHAS49544i3D.net B.VAS57866Fusix Networks B.…AS6830Liberty Global Eu…AS20562Open Peering (Bro…AS25091IP-Max SAAS2914NTT America, Inc.AS3356Lumen (Level 3)AS8283Netwerkvereniging…AS3491PCCW Global (HK) …

Networks observed one and two hops upstream of AS1104 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

19

adjacent networks

Upstreams
421%
Peers
1579%
Downstreams
00%

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

Upstreams of AS1104
NetworkCountryRelationshipPathsVantage pts
AS1103SURF B.V.NLPeer1,155139
AS49544i3D.net B.VNLPeer141
AS57866Fusix Networks B.V.NLPeer141
AS8298IPng Networks GmbHCHPeer32

Prefixes

The largest blocks AS1104 originates, widest first.

Largest prefixes originated by AS1104
PrefixAddressesVisibility
145.110.0.0/1665.5k77/77
145.116.48.0/204.1k77/77
145.116.208.0/212k77/77
194.171.96.0/212k3/77
145.102.132.0/221k3/77
145.107.4.0/221k77/77
185.153.60.0/221k77/77
145.116.216.0/2425677/77
192.16.185.0/2425677/77
192.16.186.0/2425677/77

Routing health

How AS1104'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%19
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more84.2%16
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%15.8%3

Prefix sizes

IPv4 — 14 prefixes

IPv6 — 5 prefixes

  • /324.3B × /6440.0%2
  • /4865.5k × /6460.0%3

Recent changes

Announcements that started or stopped since 22nd Sept 2026.

No announcement by AS1104 started or stopped in this period.

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