A: For normal ASCII domain names, the letters a-z, the numbers 0-9, and one special character, the hyphen or dash “-”. Note that domains cannot start or end with a hyphen. For the new tested IDNs (Internationalized Domain Names), the full range of Unicode characters are available. This allows nearly all of the languages on the planet to be represented within domain names, including Thai, Arabic, Lao, Hebrew, French, German etc.

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