Take the tour ×  I'm trying to understand the limitations of
International Domain names... can someone explain what I can and
can't do?  Can I register a neat domain name like e=mc2.com?
Are any of these symbols permitted: !@#$%^&*()_+?  share|improve
this question Please explain the close vote. There is no
rationale behind it being off topic for this forum. DNS and its'
administration, operation, and issues is entirely appropriate
for serverfault.com –  makerofthings7 Nov 16 '10 at 2:54 add
comment  4 Answers  up vote 7 down vote accepted  Punycode only
alters characters at codepoints greater than or equal to 128,
therefore the punycode representation of e=mc2 is still e=mc2
which can't be made a valid DNS name.  Unicode is full of
homographs, so the obvious thing to try would be to use U+FF1D
(Fullwidth Equals Sign), unfortunately thanks to people
registering paypal.com there are now controls on what characters
are permitted, depending on the TLD/registrar (as another
example, the new Russian Cyrillic TLD