A few days ago, the UK said it would return sovereignty of the Chagos Archipelago to Mauritius:
https://www.bbc.com/news/articles/c98ynejg4l5o
...meaning the British Indian Ocean Territory will no longer exist, and it's ISO country code "IO" should disappear. With no country code, IANA ought to retire the `.io` ccTLD:
https://www.iana.org/help/cctld-retirement
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