SUBNET.IM

AS203821IT4 Polska Sp. z o.o.

PolandRegistryRIPE NCCTypeEyeball

At a glance

IPv4 prefixes

3

IPv6 prefixes

0

IPv4 addresses

768

IPv6 /64s

0

Upstream graph

The networks AS203821 is seen behind, one and two hops out, drawn from real AS paths.

AS203821Toward the internet core
Upstream graph for AS203821: 11 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS203821IT4 Polska Sp. z …This networkAS51465M3.NET Sp. z o.o.…AS57608FIBO SAAS62081Stowarzyszenie e-…AS201054Stowarzyszenie e-…AS174Cogent Communicat…AS3356Lumen (Level 3)AS20804Exatel S.A.AS42927S-NET Sp. z o.o.AS1299Arelion (fka. Tel…AS6939Hurricane Electri…AS20473The Constant Comp…

Networks observed one and two hops upstream of AS203821 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

8

adjacent networks

Upstreams
450%
Peers
450%
Downstreams
00%

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

Upstreams of AS203821
NetworkCountryRelationshipPathsVantage pts
AS62081Stowarzyszenie e-PoludniePLPeer19565
AS57608FIBO SAPLPeer248
AS51465M3.NET Sp. z o.o. / Fixmap GroupPLPeer186
AS201054Stowarzyszenie e-PoludniePLPeer31

Prefixes

The largest blocks AS203821 originates, widest first.

Largest prefixes originated by AS203821
PrefixAddressesVisibility
91.207.184.0/2425680/80
91.207.185.0/2425680/80
217.28.134.0/2425680/80

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