subnet.im

AS204150David Zakoucky

CzechiaRegistryRIPE NCC

As of 10th November 2026, AS204150 (David Zakoucky), a network registered in Czechia with RIPE NCC, originates 1 IPv6 prefix. It is seen behind 1 upstream network, most often AS215353 (Josef Hrabe). 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

0

IPv6 prefixes

1

IPv4 addresses

0

IPv6 /64s

65.5k

Upstream graph

The networks AS204150 is seen behind, one and two hops out, drawn from real AS paths.

AS204150Toward the internet core
Upstream graph for AS204150: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS204150David ZakouckyThis networkAS215353Josef HrabeAS39392SH.cz s.r.o.AS213382PEERYX NETWORK SAS

Networks observed one and two hops upstream of AS204150 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

3

adjacent networks

Upstreams
133%
Peers
267%
Downstreams
00%

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

Upstreams of AS204150
NetworkCountryRelationshipPathsVantage pts
AS215353Josef HrabeCZPeer6161

Prefixes

The largest blocks AS204150 originates, widest first.

Largest prefixes originated by AS204150
PrefixAddressesVisibility
2a14:7580:fff0::/4865.5k × /6461/63

Routing health

How AS204150'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

IPv6 — 1 prefixes

  • /4865.5k × /64100.0%1

Recent changes

Announcements that started or stopped since 11th Oct 2026.

  • Withdrawn164.37.194.0/2420th Oct 2026
  • Announced164.37.194.0/2412th Oct 2026
  • Withdrawn2a0f:6284:800::/4812th Oct 2026
  • Withdrawn2a0f:6284:801::/4812th Oct 2026
  • Withdrawn2a0f:6284:802::/4812th Oct 2026
  • Withdrawn2a0f:6284:803::/4812th Oct 2026
  • Withdrawn2a0f:6284:804::/4812th Oct 2026
  • Withdrawn2a0f:6284:805::/4812th Oct 2026
  • Withdrawn2a0f:6284:806::/4812th Oct 2026
  • Withdrawn2a0f:6284:807::/4812th Oct 2026
  • Withdrawn2a0f:6284:808::/4812th Oct 2026
  • Withdrawn2a0f:6284:809::/4812th Oct 2026

1 announced and 18 withdrawn in all; the most recent are shown.

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