Dear colleagues, All the RIPE Atlas anchors run a caching DNS resolver. This resolver is used to look up names when a measurement requests name resolution using a probe's resolver. We have been running an older version of BIND for this service. In the coming days, we will be upgrading the version of BIND to the latest stable version (9.14). This version has dropped many work-arounds for various forms of brokenness in other DNS implementations. The effect of this is that a small number of domains hosted on broken DNS implementations cannot be looked up by this newer version of BIND. If you are running a measurement that uses an anchor's local resolver, and you find that some domain names are failing to resolve, it may be caused by this upgrade. Regards, Anand Buddhdev RIPE NCC