SUBNET.IM

AS27University of Maryland

United StatesRegistryARINTypeEyeball

At a glance

IPv4 prefixes

5

IPv6 prefixes

6

IPv4 addresses

135k

IPv6 /64s

393k

Upstream graph

The networks AS27 is seen behind, one and two hops out, drawn from real AS paths.

AS27Toward the internet core
Upstream graph for AS27: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS27University of Mar…This networkAS10886University of Mar…AS1299Arelion (fka. Tel…AS6461Zayo Bandwidth

Networks observed one and two hops upstream of AS27 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 AS27
NetworkCountryRelationshipPathsVantage pts
AS10886University of MarylandUSPeer759140

Prefixes

The largest blocks AS27 originates, widest first.

Largest prefixes originated by AS27
PrefixAddressesVisibility
128.8.0.0/1665.5k79/80
129.2.0.0/1665.5k79/80
192.54.96.0/212k79/80
192.54.100.0/221k79/80
192.54.94.0/2351279/80
2605:880::/4865.5k × /6461/62
2605:880:1::/4865.5k × /6461/62
2605:880:10::/4865.5k × /6461/62
2605:880:20::/4865.5k × /6460/62
2605:880:22::/4865.5k × /6460/62

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