SUBNET.IM

AS5421Sofia University "St. Kliment Ohridski"

BulgariaRegistryRIPE NCC

At a glance

IPv4 prefixes

3

IPv6 prefixes

4

IPv4 addresses

9.7k

IPv6 /64s

266k

Upstream graph

The networks AS5421 is seen behind, one and two hops out, drawn from real AS paths.

AS5421Toward the internet core
Upstream graph for AS5421: 6 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS5421Sofia University …This networkAS6802Bulgarian Researc…AS8717A1 Bulgaria EADAS8262Evolink EADAS21320GEANT VerenigingAS3356Lumen (Level 3)AS6461Zayo Bandwidth

Networks observed one and two hops upstream of AS5421 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

4

adjacent networks

Upstreams
250%
Peers
250%
Downstreams
00%

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

Upstreams of AS5421
NetworkCountryRelationshipPathsVantage pts
AS6802Bulgarian Research and Education Network Association (BREN)BGPeer415142
AS8717A1 Bulgaria EADBGPeer1414

Prefixes

The largest blocks AS5421 originates, widest first.

Largest prefixes originated by AS5421
PrefixAddressesVisibility
62.44.96.0/198.2k80/80
62.44.120.0/221k80/80
62.44.124.0/2351280/80
2001:67c:20d0::/47131k × /6462/62
2001:67c:20d0::/4865.5k × /6462/62
2001:67c:20d1::/4865.5k × /6462/62
2001:67c:20d1:1000::/524.1k × /643/62

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