subnet.im

AS201865Yukhnovskii Institute for Condensed Matter Physics of the National Academy of Sciences of Ukraine

UkraineRegistryRIPE NCC

As of 10th November 2026, AS201865 (Yukhnovskii Institute for Condensed…), a network registered in Ukraine with RIPE NCC, originates 1 IPv4 prefix covering 256 addresses. By IPv4 address space that makes it the 59,962nd-largest of the 80,733 networks we see originating IPv4, and the 999th-largest of 1,549 in Ukraine. It is seen behind 2 upstream networks, most often AS3255 (Ukrainian Academic and Research Network) and AS12687 (User Association of Ukrainian Research…), and in front of 1 downstream network. 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

0

IPv4 addresses

256

IPv6 /64s

0

Upstream graph

The networks AS201865 is seen behind, one and two hops out, drawn from real AS paths.

AS201865Toward the internet core
Upstream graph for AS201865: 6 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS201865Yukhnovskii Insti…This networkAS3255Ukrainian Academi…AS12687User Association …AS2914NTT America, Inc.AS6939Hurricane Electri…AS9002RETN LimitedAS21320GEANT Vereniging

Networks observed one and two hops upstream of AS201865 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
233%
Peers
350%
Downstreams
117%

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

Upstreams of AS201865
NetworkCountryRelationshipPathsVantage pts
AS3255Ukrainian Academic and Research NetworkUAPeer7575
AS12687User Association of Ukrainian Research and Academic Network URANUAPeer21

Prefixes

The largest blocks AS201865 originates, widest first.

Largest prefixes originated by AS201865
PrefixAddressesVisibility
194.44.28.0/2425676/76

Routing health

How AS201865'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

IPv4 — 1 prefixes

Recent changes

Announcements that started or stopped since 12th Oct 2026.

No announcement by AS201865 started or stopped in this period.

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