> The RFC may expire, but it quotes the ISO3166 This is not the argument you think that it is. > zz is safe for personal use. Those guidelines will not change

> The RFC may expire, but it quotes the ISO3166 This is not the argument you think that it is. > zz is safe for personal use. Those guidelines will not change Right. Safe for personal use within the range of uses for ISO 3166—guaranteed not to collide with any future two-letter country code. It's not a commitment from ICANN, which remains free to say, "ISO 3166 guarantees no collisions for AA. We choose, therefore, to open up bidding to auction off aa, which is expected to fetch a pretty penny as the first of a limited set of possible TLDs that are < 3 characters long."