SUBNET.IM

AS23309Contra Costa County Office of Education

United StatesRegistryARIN

At a glance

IPv4 prefixes

1

IPv6 prefixes

1

IPv4 addresses

65.5k

IPv6 /64s

4.3B

Upstream graph

The networks AS23309 is seen behind, one and two hops out, drawn from real AS paths.

AS23309Toward the internet core
Upstream graph for AS23309: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS23309Contra Costa Coun…This networkAS2152CENIC - CalRENAS3356Lumen (Level 3)AS6939Hurricane Electri…

Networks observed one and two hops upstream of AS23309 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 AS23309
NetworkCountryRelationshipPathsVantage pts
AS2152CENIC - CalRENUSPeer141141

Prefixes

The largest blocks AS23309 originates, widest first.

Largest prefixes originated by AS23309
PrefixAddressesVisibility
169.199.0.0/1665.5k80/80
2607:fb78::/324.3B × /6461/62

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