subnet.im

AS2036623K33 sp. z o.o.

PolandRegistryRIPE NCCTypeContent

As of 11th November 2026, AS203662 (3K33 sp. z o.o.), a content network registered in Poland with RIPE NCC, originates 5 IPv4 prefixes covering 2k addresses and 6 IPv6 prefixes. By IPv4 address space that makes it the 25,847th-largest of the 80,747 networks we see originating IPv4, and the 510th-largest of 2,109 in Poland. It is seen behind 5 upstream networks, most often AS9002 (RETN Limited) and AS19318 (Interserver, Inc). Every one of its announcements has a valid RPKI ROA, and none are RPKI-invalid. 64% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

5

IPv6 prefixes

6

IPv4 addresses

2k

IPv6 /64s

19.1M

Upstream graph

The networks AS203662 is seen behind, one and two hops out, drawn from real AS paths.

AS203662Toward the internet core
Upstream graph for AS203662: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS2036623K33 sp. z o.o.This networkAS9002RETN LimitedAS19318Interserver, IncAS53667FranTech SolutionsAS1414093K33 sp. z o.o.AS200088Artnet Sp. z o.o.AS3356Lumen (Level 3)AS6667Elisa OyjAS3257GTT Communication…AS6453TATA Communicatio…AS174Cogent Communicat…AS6939Hurricane Electri…AS136557Host Universal Pt…

Networks observed one and two hops upstream of AS203662 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

10

adjacent networks

Upstreams
550%
Peers
550%
Downstreams
00%

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

Upstreams of AS203662
NetworkCountryRelationshipPathsVantage pts
AS9002RETN LimitedGBPeer320137
AS19318Interserver, IncUSPeer21797
AS53667FranTech SolutionsUSPeer6363
AS1414093K33 sp. z o.o.SGPeer4040
AS200088Artnet Sp. z o.o.PLPeer2823

Prefixes

The largest blocks AS203662 originates, widest first.

Largest prefixes originated by AS203662
PrefixAddressesVisibility
156.9.60.0/221k55/76
65.87.223.0/2425655/76
144.79.59.0/2425676/76
151.245.112.0/2425676/76
199.19.77.0/2425676/76
2602:f2d5::/4016.8M × /6442/63
2a14:1ec7:f710::/441M × /6461/63
2a14:1ec7:f740::/441M × /6442/63
2a14:1ec7:f7fe::/4865.5k × /6461/63
2a14:1ec7:f7ff::/4865.5k × /6463/63

Routing health

How AS203662'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%11
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more63.6%7
  • Partially propagated40% to 90%36.4%4
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 5 prefixes

IPv6 — 6 prefixes

  • /4016.8M × /6416.7%1
  • /441M × /6433.3%2
  • /4865.5k × /6450.0%3

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.