How close is each network to the Internet's core?
Every month CAIDA publishes the relationships between the Internet's Autonomous Systems (ASes). NetCores peels that graph into k-cores and tracks each AS's shell index since 1998. A normalized value of 1 means the AS is in the innermost core.
IPv4 snapshots
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IPv6 snapshots
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ASes seen (IPv4)
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across all snapshots
Latest snapshot
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Shell index over time
The core over time
IPv4
IPv6
Maximum shell index
How deep the graph is: the k of the innermost core.
ASes in the innermost core
How many networks share the top shell.
ASes in the graph
All networks in the snapshot.
Who is in the core
| AS | Name | Country | Shell | Add |
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