What Is IDN (Internationalized Domain Name)?
An IDN (Internationalized Domain Name) is a domain name that contains characters from non-ASCII scripts — such as Chinese (中文.com), Arabic (مثال.com), Japanese, Korean, Cyrillic, or accented Latin characters (münchen.de). IDNs allow internet users to use domain names in their native languages and scripts.
Technically, IDNs work through a system called Punycode, which converts non-ASCII characters into an ASCII-compatible format that DNS can process. For example, münchen.de is encoded as xn--mnchen-3ya.de in the DNS system, but displays as münchen.de in browsers.
IDN markets are most active in China (Chinese character domains), Japan, Korea, and German-speaking countries. In the broader domain investing world, IDNs are a specialized niche with different valuation dynamics than ASCII domains.
Why This Matters for Startups
For most English-language startups, IDNs aren't relevant for your primary domain. However, if you're targeting non-English markets — particularly China, Japan, or Arabic-speaking countries — understanding IDNs helps you serve those audiences. Defensive registration of your brand in relevant scripts can also protect against impersonation in international markets.
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