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AS218766Semjon Horvath

GermanyRegistryRIPE NCC

As of 10th November 2026, AS218766 (Semjon Horvath), a network registered in Germany with RIPE NCC, originates 1 IPv4 prefix covering 256 addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 59,962nd-largest of the 80,733 networks we see originating IPv4, and the 1,778th-largest of 2,330 in Germany. It is seen behind 2 upstream networks, most often AS34927 (iFog GmbH) and AS20473 (The Constant Company, LLC). 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

1

IPv4 addresses

256

IPv6 /64s

65.5k

Upstream graph

The networks AS218766 is seen behind, one and two hops out, drawn from real AS paths.

AS218766Toward the internet core
Upstream graph for AS218766: 6 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS218766Semjon HorvathThis networkAS20473The Constant Comp…AS34927iFog GmbHAS1299Arelion (fka. Tel…AS2914NTT America, Inc.AS6939Hurricane Electri…AS9002RETN Limited

Networks observed one and two hops upstream of AS218766 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

4

adjacent networks

Upstreams
250%
Peers
250%
Downstreams
00%

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

Upstreams of AS218766
NetworkCountryRelationshipPathsVantage pts
AS34927iFog GmbHCHPeer9090
AS20473The Constant Company, LLCUSPeer4747

Prefixes

The largest blocks AS218766 originates, widest first.

Largest prefixes originated by AS218766
PrefixAddressesVisibility
143.246.142.0/2425676/76
2a0c:9a40:e120::/4865.5k × /6461/63

Routing health

How AS218766'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%2
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more100.0%2
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 1 prefixes

IPv6 — 1 prefixes

  • /4865.5k × /64100.0%1

Recent changes

Announcements that started or stopped since 12th Oct 2026.

No announcement by AS218766 started or stopped in this period.

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