In more detail
münchen.de is stored as xn--mnchen-3ya.de. Lookalike characters from other scripts can be used to imitate a real domain, so a suspicious link whose hostname starts with xn-- deserves a decoding check.
Glossary
Networking
Punycode
Punycode is the encoding that lets domain names with non-ASCII characters be stored in the ASCII-only DNS, marked by the prefix `xn--`.
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See also
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Glossary
Domain name
A domain name is the human-readable address of a website or service, such as example.com, which DNS translates into an IP address.
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Glossary
Unicode
Unicode is the universal standard that gives every character in the world's writing systems, plus symbols and emoji.
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Glossary
Phishing
Phishing is a scam in which attackers pose as a trusted organisation or person, usually by email or text.