Categories of Internet Domains

• Generic Top Level Domains (gTLDs)

  • .com, .net. .org, .gov, .mil, .edu, .int
  • .com, .net. .org open for registration by all; others restricted in various ways

• Country Code Top Level Domains (ccTLDs)

  • .kr., .uk, .fr, .us, .mx, .ca, .de, etc.
  • Registration requirements vary by domain (many require domicile within the territory or other connection with the territory)
  • Derived from ISO 3166-1 list

• Infrastructure Top Level Domain

  • .arpa

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