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AS43972Sergey Olenich

RussiaRegistryRIPE NCCTypeEyeball

As of 27th September 2026, AS43972 (Sergey Olenich), an access network registered in Russia with RIPE NCC, originates 2 IPv4 prefixes covering 512 addresses. By IPv4 address space that makes it the 48,558th-largest of the 79,525 networks we see originating IPv4, and the 2,620th-largest of 4,942 in Russia. It is seen behind 3 upstream networks, most often AS48882 (Optima-Shid LLC) and AS43201 (Telematika LLC). 50% 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

0

IPv4 addresses

512

IPv6 /64s

0

Upstream graph

The networks AS43972 is seen behind, one and two hops out, drawn from real AS paths.

AS43972Toward the internet core
Upstream graph for AS43972: 8 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS43972Sergey OlenichThis networkAS43201Telematika LLCAS48882Optima-Shid LLCAS199961Multitelesystems …AS35598INETCOM CARRIER L…AS52091Level-MSK Ltd.AS47502Optima-Telecom LLCAS201776Miranda-Media LtdAS48084Uzhnie Magistralj…

Networks observed one and two hops upstream of AS43972 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

6

adjacent networks

Upstreams
350%
Peers
350%
Downstreams
00%

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

Upstreams of AS43972
NetworkCountryRelationshipPathsVantage pts
AS48882Optima-Shid LLCRUPeer10957
AS43201Telematika LLCRUPeer4026
AS199961Multitelesystems LLCRUPeer1313

Prefixes

The largest blocks AS43972 originates, widest first.

Largest prefixes originated by AS43972
PrefixAddressesVisibility
31.40.131.0/2425681/81
176.96.240.0/2425681/81

Routing health

How AS43972'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

  • Valid50.0%1
  • Invalid0.0%0
  • No ROA50.0%1

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 — 2 prefixes

Recent changes

Announcements that started or stopped since 28th Aug 2026.

No announcement by AS43972 started or stopped in this period.

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