How to make the domain name with a capital letter?

How to make the domain name with a capital letter?

like Surn开发者_运维技巧ame.com instead of surname.com

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You can't, because domain names are case-insensitive. In other words: Surname.com is exactly the same as surname.com.

And the canonical version is the lower-case name (i.e. if you enter "Surname.com" in your browser, it will automatically be converted to "surname.com").

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Whilst DNS itself is case-insensitive, at least one search engine allows you to declare preferred case in search results: Yandex.

The Case of the site name tool lets you set preferred capitalisation in certain cases. This can be accessed in Yandex.Webmaster under Appearance in search results > URL letter case.

I've set this for a few of my sites and it's quite nice to see.