1. .com – Its name is derived from the word commercial. Introduced in 1985.
  2. .net – The name is derived from network. Introduced the same year as .com.
  3. .org – The name is truncated from organization. Introduced in 1985.
  4. .tk – This domain name is the Internet country code top-level domain for Tokelau, a territory of New Zealand located in the South Pacific. Introduced in 1997.
  5. .eu – .eu is the country code top-level domain or the European Union. Introduced in 2005.
  6. .co – The domain name is the Internet country code top-level domain assigned to Colombia. Introduced in 1991, but without registration restrictions it is available for anyone to register since 2010.
  7. .us – .us is the Internet country code top-level domain for the United States. Introduced in 1985.
  8. .biz – It is intended for registration of domains to be used by businesses. Introduced in 2001.
  9. .me – .me is the Internet country code top-level domain for Montenegro. Replaced the .yu (Yugoslavia) domain. Introduced in 2006.
  10. .it – This domain name is the Internet country code top-level domain for Italy. Introduced in 1987.