Punycode
An encoded form used for internationalized domain names.
Why it matters
It is legitimate technology, but attackers can use it to hide lookalike domains.
Example pattern
A domain beginning with xn-- may represent non-ASCII characters.
How CheckLink can help
CheckLink detects punycode in hostnames.
Related terms
Related guides
Check the signal in context
Security terms are useful, but real decisions need context. Use CheckLink to inspect available signals before you click.