IDN table

A list published by a registry (glossary)registry The central database and system of a top-level domain, or loosely the organization that runs it. Full definition of registry showing which characters it accepts in internationalized domain names (glossary)domain name A readable internet name made of labels separated by dots. Full definition of domain name for a given language or script, and which characters count as variants of each other. IANA (glossary)IANA Internet Assigned Numbers Authority The functions that coordinate the root zone, IP addresses and protocol numbers. Full definition of IANA keeps a public collection of these lists. They decide whether a particular non-ASCII name can be registered.