.sk

.sk is the Internet country code top-level domain (ccTLD) for Slovakia. It is administered by SK-NIC a.s.. Registrations are only allowed to local entities.

Additional info
.бг
.бг (Punycode: .xn--90ae; abbreviation of Bulgarian: България, Bălgarija) is a proposed internationalized country code top-level domain (ccTLD) for Bulgaria.[1][2]
.рф
.рф (Russian: Российская Федерация, transliterated: Rossiyskaya Federatsiya, English: Russian Federation) is a first Internet Cyrillic country code top-level domain for use by the Russian Federation.[2]
.укр
.укр (abbreviation of Ukrainian: Україна, transliterated: Ukrayina, English: Ukraine) is a proposed internationalized country code top-level domain (ccTLD) for Ukraine in addition to its current (in Latin alphabet) '.ua'.
.ac
.ac is the Internet country code top-level domain (ccTLD) for Ascension Island. It is administered by NIC.AC, a subsidiary of the Internet Computer Bureau based in the United Kingdom.
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