SUBNET.IM

AS203645Jan Ryznar

CzechiaRegistryRIPE NCC

At a glance

IPv4 prefixes

4

IPv6 prefixes

23

IPv4 addresses

1k

IPv6 /64s

235M

Upstream graph

The networks AS203645 is seen behind, one and two hops out, drawn from real AS paths.

AS203645Toward the internet core
Upstream graph for AS203645: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS203645Jan RyznarThis networkAS28725CETIN a.s.AS174Cogent Communicat…AS1299Arelion (fka. Tel…

Networks observed one and two hops upstream of AS203645 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

2

adjacent networks

Upstreams
150%
Peers
150%
Downstreams
00%

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

Upstreams of AS203645
NetworkCountryRelationshipPathsVantage pts
AS28725CETIN a.s.CZPeer1,719140

Prefixes

All 27

The largest blocks AS203645 originates, widest first.

Largest prefixes originated by AS203645
PrefixAddressesVisibility
185.133.188.0/2425679/80
185.133.189.0/2425679/80
185.133.190.0/2425679/80
185.133.191.0/2425679/80
2a01:7d20:100::/4016.8M × /6461/62
2a01:7d20:200::/4016.8M × /6461/62
2a01:7d20:300::/4016.8M × /6461/62
2a01:7d20:500::/4016.8M × /6461/62
2a01:7d20:700::/4016.8M × /6461/62
2a01:7d20:a00::/4016.8M × /6461/62

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