A domain must not contain any special character.
If your result seems not to be expected you can try it with 1.co.uk as domain.
If you want to refer to this result, you can use this link: http://www.domaininformation.de/whois/%241.co.uk
Error for "$1.co.uk".
Domain names may only comprise the characters A-Z, a-z, 0-9, hyphen (-)
and dot (.).
WHOIS lookup made at 20:50:56 22-Apr-2011
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Copyright Nominet UK 1996 - 2011.
You may not access the .uk WHOIS or use any data from it except as permitted
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