The RIPE NCC mirrored this dataset until 2019. The original data can be found here: https://web.eecs.umich.edu/~harshavm/iplane/ . This dataset contains traceroutes from PlanetLab nodes and traceroute servers that were done as part of the iPlane project at the University of Washington between 2006 and 2016.
NOTE: The information on this page is outdated. This page is available for historical purposes only. You can find the original source for iPlane traceroute data here.
Data Supplier: iPlane - University of Washington