Country Code Top-Level Domains (ccTLDs) — Using Country Codes in DNS

What Are ccTLDs?

Country code top-level domains (ccTLDs) are two-letter domain extensions assigned to countries and territories. They are directly derived from ISO 3166-1 alpha-2 codes (with a few exceptions like .uk instead of .gb for the United Kingdom).

Standard ccTLD Usage

Most countries use their ccTLD for local businesses and organizations:

ccTLD	Country	Example
.de	Germany	bmw.de
.jp	Japan	toyota.jp
.fr	France	paris.fr
.br	Brazil	uol.com.br
.cn	China	baidu.cn
.in	India	irctc.co.in

Creative and Commercial ccTLDs

Some ccTLDs have become popular for non-geographic purposes:

ccTLD	Country	Popular Use
.io	British Indian Ocean Territory	Tech startups and open-source projects
.tv	Tuvalu	Streaming and video platforms
.ai	Anguilla	Artificial intelligence companies
.co	Colombia	Alternative to .com for businesses
.me	Montenegro	Personal websites and portfolios
.fm	Micronesia	Radio stations and music platforms
.gg	Guernsey	Gaming communities
.to	Tonga	URL shorteners (link.to)
.ly	Libya	Short URLs and analytics (bit.ly)
.la	Laos	Los Angeles-related sites

SEO Implications

Search engines treat ccTLDs as a geo-targeting signal. A site on .de is assumed to target German users. This affects:

• Local search rankings — ccTLDs rank better in their respective countries
• International SEO — Use subdirectories (/de/) or subdomains (de.example.com) with gTLDs for multi-country sites
• hreflang tags — Combine ccTLDs with hreflang for precise geo-language targeting

ccTLD Registration Policies

Policies vary by country:

• Unrestricted — .com.au (was restricted, now open), .co, .io, .tv
• Restricted to residents — .fr (French entities), .cn (Chinese entities)
• Restricted to government — .gov (US federal), .go.jp (Japanese government)

Notable Exceptions

• .uk — Used instead of .gb (the actual alpha-2 code for United Kingdom)
• .eu — Assigned to the European Union, not a country
• .su — Soviet Union code, still active despite the country no longer existing