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AS50917Diederik Focko de Zee

NetherlandsRegistryRIPE NCCTypeCarrier

As of 26th September 2026, AS50917 (Diederik Focko de Zee), a transit carrier registered in the Netherlands with RIPE NCC, originates 3 IPv4 prefixes covering 768 addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 44,910th-largest of the 79,516 networks we see originating IPv4, and the 617th-largest of 1,023 in the Netherlands. It is seen behind 16 upstream networks, most often AS174 (Cogent Communications, LLC) and AS20495 (We Dare B.V.), and in front of 22 downstream networks. 75% of its announcements have 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

3

IPv6 prefixes

1

IPv4 addresses

768

IPv6 /64s

65.5k

Upstream graph

The networks AS50917 is seen behind, one and two hops out, drawn from real AS paths.

AS50917Toward the internet core
Upstream graph for AS50917: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS50917Diederik Focko de…This networkAS174Cogent Communicat…AS6939Hurricane Electri…AS9002RETN LimitedAS20495We Dare B.V.AS216265ARISTO NETWORKS L…AS1299Arelion (fka. Tel…AS151326DCConnect Communi…AS18106Viewqwest Pte LtdAS20130Depaul UniversityAS6453TATA Communicatio…AS9136WOBCOM GmbHAS1273Vodafone Group PLC

Networks observed one and two hops upstream of AS50917 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

116

adjacent networks

Upstreams
1614%
Peers
7867%
Downstreams
2219%

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

Upstreams of AS50917
NetworkCountryRelationshipPathsVantage pts
AS174Cogent Communications, LLCUSPeer2,85463
AS20495We Dare B.V.NLPeer2,40828
AS216265ARISTO NETWORKS LTDGBPeer1,90977
AS6939Hurricane Electric LLCUSPeer99961
AS9002RETN LimitedGBPeer85474
AS213753InterEdge B.V.NLPeer42479
AS39122Blacknight Internet Solutions LimitedIEPeer972
AS35133Eranium B.V.NLPeer959
AS24940Hetzner Online GmbHDEPeer942
AS16276OVH SASFRPeer8181

Prefixes

The largest blocks AS50917 originates, widest first.

Largest prefixes originated by AS50917
PrefixAddressesVisibility
45.152.39.0/2425680/81
89.37.98.0/2425680/81
103.141.12.0/2425681/81
2001:678:7ec::/4865.5k × /6462/64

Routing health

How AS50917'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

  • Valid75.0%3
  • Invalid0.0%0
  • No ROA25.0%1

Propagation

  • Globally propagated90% of full-feed peers or more100.0%4
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 3 prefixes

IPv6 — 1 prefixes

  • /4865.5k × /64100.0%1

Recent changes

Announcements that started or stopped since 28th Aug 2026.

No announcement by AS50917 started or stopped in this period.

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