SUBNET.IM

AS1237Korea Research Environment Open NETwork

South KoreaRegistryAPNICTypeEyeball

At a glance

IPv4 prefixes

212

IPv6 prefixes

4

IPv4 addresses

307k

IPv6 /64s

4.3B

Upstream graph

The networks AS1237 is seen behind, one and two hops out, drawn from real AS paths.

AS1237Toward the internet core
Upstream graph for AS1237: 7 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS1237Korea Research En…This networkAS4766Korea TelecomAS17579KISTIAS399861Mobite Network LLCAS132337AxclusiveAS174Cogent Communicat…AS6939Hurricane Electri…AS24482SG.GS

Networks observed one and two hops upstream of AS1237 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

90

adjacent networks

Upstreams
33%
Peers
4752%
Downstreams
4044%

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

Upstreams of AS1237
NetworkCountryRelationshipPathsVantage pts
AS17579KISTIKRPeer28,62087
AS4766Korea TelecomKRPeer5,528135
AS399861Mobite Network LLCUSPeer1,04080

Prefixes

All 216

The largest blocks AS1237 originates, widest first.

Largest prefixes originated by AS1237
PrefixAddressesVisibility
134.75.0.0/1665.5k80/80
150.183.0.0/1665.5k80/80
203.250.192.0/1816.4k80/80
203.250.0.0/198.2k80/80
210.119.64.0/198.2k80/80
203.247.192.0/204.1k80/80
203.253.96.0/204.1k80/80
203.254.176.0/204.1k80/80
210.107.160.0/204.1k80/80
210.110.144.0/204.1k80/80

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