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AS205421Sculk Software LLC

RussiaRegistryRIPE NCCTypeContent

As of 11th November 2026, AS205421 (Sculk Software LLC), a content network registered in Russia with RIPE NCC, originates 2 IPv4 prefixes covering 512 addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 49,318th-largest of the 80,743 networks we see originating IPv4, and the 2,647th-largest of 4,983 in Russia. It is seen behind 4 upstream networks, most often AS35598 (INETCOM CARRIER LLC) and AS56694 (LLC Smart Ape). 67% 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

2

IPv6 prefixes

1

IPv4 addresses

512

IPv6 /64s

65.5k

Upstream graph

The networks AS205421 is seen behind, one and two hops out, drawn from real AS paths.

AS205421Toward the internet core
Upstream graph for AS205421: 11 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS205421Sculk Software LLCThis networkAS35598INETCOM CARRIER L…AS49544i3D.net B.VAS56694LLC Smart ApeAS62255BiMajLink d.o.o.AS6939Hurricane Electri…AS20485JSC TransTeleComAS2914NTT America, Inc.AS3356Lumen (Level 3)AS57304RETN RussiaAS1299Arelion (fka. Tel…AS174Cogent Communicat…

Networks observed one and two hops upstream of AS205421 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

9

adjacent networks

Upstreams
444%
Peers
556%
Downstreams
00%

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

Upstreams of AS205421
NetworkCountryRelationshipPathsVantage pts
AS35598INETCOM CARRIER LLCRUPeer13266
AS56694LLC Smart ApeRUPeer6363
AS62255BiMajLink d.o.o.SIPeer189
AS49544i3D.net B.VNLPeer21

Prefixes

The largest blocks AS205421 originates, widest first.

Largest prefixes originated by AS205421
PrefixAddressesVisibility
91.199.230.0/2425676/76
95.214.92.0/2425676/76
2a0d:d940:9007::/4865.5k × /6463/63

Routing health

How AS205421'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

  • Valid66.7%2
  • Invalid0.0%0
  • No ROA33.3%1

Propagation

  • Globally propagated90% of full-feed peers or more100.0%3
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 2 prefixes

IPv6 — 1 prefixes

  • /4865.5k × /64100.0%1

Recent changes

Announcements that started or stopped since 12th Oct 2026.

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