SUBNET.IM

AS57121Piotr Bukowczyk trading as IT Systematic Group

PolandRegistryRIPE NCC

At a glance

IPv4 prefixes

5

IPv6 prefixes

0

IPv4 addresses

7.4k

IPv6 /64s

0

Upstream graph

The networks AS57121 is seen behind, one and two hops out, drawn from real AS paths.

AS57121Toward the internet core
Upstream graph for AS57121: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS57121Piotr Bukowczyk t…This networkAS3257GTT Communication…AS50606Horyzont Technolo…AS50607Stowarzyszenie e-…AS50625Krosnienskie Cent…AS201054Stowarzyszenie e-…AS2497Internet Initiati…AS6667Elisa OyjAS9002RETN LimitedAS3356Lumen (Level 3)AS6939Hurricane Electri…AS20804Exatel S.A.AS20473The Constant Comp…

Networks observed one and two hops upstream of AS57121 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

15

adjacent networks

Upstreams
747%
Peers
853%
Downstreams
00%

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

Upstreams of AS57121
NetworkCountryRelationshipPathsVantage pts
AS50607Stowarzyszenie e-PoludniePLPeer16035
AS3257GTT Communications Inc.USPeer11126
AS50606Horyzont Technologie Internetowe sp.z.o.o.PLPeer5813
AS50625Krosnienskie Centrum Informatyczne "KROSOFT"PLPeer4343
AS201054Stowarzyszenie e-PoludniePLPeer194
AS49544i3D.net B.VNLPeer51
AS24482SG.GSSGPeer41

Prefixes

The largest blocks AS57121 originates, widest first.

Largest prefixes originated by AS57121
PrefixAddressesVisibility
176.96.160.0/204.1k80/80
176.96.144.0/212k80/80
192.109.84.0/2351280/80
192.109.132.0/2351280/80
91.230.221.0/2425680/80

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