SUBNET.IM

AS31621Allegro sp. z o.o.

PolandRegistryRIPE NCC

At a glance

IPv4 prefixes

12

IPv6 prefixes

4

IPv4 addresses

5.1k

IPv6 /64s

12.9B

Upstream graph

The networks AS31621 is seen behind, one and two hops out, drawn from real AS paths.

AS31621Toward the internet core
Upstream graph for AS31621: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS31621Allegro sp. z o.o.This networkAS42656Allegro sp. z o.o.AS1299Arelion (fka. Tel…AS3356Lumen (Level 3)

Networks observed one and two hops upstream of AS31621 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 AS31621
NetworkCountryRelationshipPathsVantage pts
AS42656Allegro sp. z o.o.PLPeer1,172142

Prefixes

The largest blocks AS31621 originates, widest first.

Largest prefixes originated by AS31621
PrefixAddressesVisibility
178.21.152.0/221k80/80
185.31.24.0/221k48/80
91.194.188.0/2351280/80
178.21.156.0/2351280/80
91.194.188.0/2425680/80
178.21.153.0/2425680/80
185.31.24.0/2425679/80
185.31.25.0/2425679/80
185.31.26.0/2425679/80
185.31.27.0/2425679/80

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