To arrange to host anycast service for these zones, contact the AS112 Project. You should know how to configure both intra-AS routing, and inter-AS routing using BGP, and you should plan on running a stealth slave of the IANA.ORG zone so that your servers will return appropriate glue in their responses.

For a more general overview, see http://www.chagreslabs.net/jmbrown/research/as112/.