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The IPv6 Routed /48 Topology Dataset

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The IPv6 Routed /48 Topology Dataset

This dataset contains information useful for studying the IP- and AS-topology of the IPv6 Internet. The goal of these measurements is to discover how much subnetting exists in IPv6 prefixes announced in BGP. For our purposes, a BGP prefix has subnetting if traceroutes to different addresses within the prefix yield different topology. This dataset consists of traceroute paths to the ::1 address (that is, the first non-zero address) within each /48 prefix obtained by splitting all announced /32 prefixes into /48's. Specifically, we split 6,200 /32 prefixes found in a RouteViews BGP table from 2014-11-13 into 406 million /48's (the full BGP table yields 5 billion /48's, which is too many to probe in a reasonable time frame, so we did not use any BGP prefixes shorter or longer than /32 when determining the set of target /48 prefixes).

The 406 million /48's were probed by a globally distributed set of 31 Archipelago (Ark) monitors between 2014-11-19 and 2015-02-27 using scamper to perform ICMP-based traceroutes using the Paris traceroute technique.

Data availability

The IPv6 Routed /48 topology data are available as a public dataset.

Acceptable Use Agreement

Access to these data is subject to the terms of the following CAIDA Acceptable Use Agreement (printable version in PDF format)

When referencing this data (as required by the AUA), please use:

The CAIDA UCSD IPv6 Routed /48 Topology Dataset,
Also, please, report your publication to CAIDA.

Request Data Access

Access the publicly available CAIDA IPv6 Routed /48 Topology Dataset (and other topology data)

Topology Datasets


For more information on CAIDA topology measurements, see:

For more information on topology measurements in general see:

  Last Modified: Tue Oct-13-2020 22:22:00 UTC
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