Fellow Hackers, At the recent IETF 101 hackathon, Matthijs Mekking worked with me on a project to reduce the size of DNS incremental zone transfers (IXFRs). If you want to know more about this, you can read a blog article on RIPE Labs that Matthijs has written: https://labs.ripe.net/Members/matthijs_mekking/making-ixfr-small-again Cheers, -- Shane