CNNIC (China Internet Network Information Center) was founded in 1997 and is headquartered in Beijing. It is the official registry for .cn, China's ccTLD, operating 21M+ domains—the world's largest ccTLD—and supporting Chinese IDN domain registration.
SWITCH, founded in 1992 in Zurich, Switzerland, is the non-profit ccTLD registry for .ch (Switzerland) and .li (Liechtenstein), managing 2M+ domains and operating the Swiss academic network SWITCHlan.
NIC.br (Brazilian Network Information Center) is the official registry operator for the .br Brazil country-code top-level domain, operating the Brazilian domain system on a non-profit basis while also managing IP address allocation, internet governance, and technology development.
ICANN (Internet Corporation for Assigned Names and Numbers) is a US nonprofit founded in Los Angeles in 1998 that coordinates the global domain name system, accredits registrars, and sets domain policy as a multi-stakeholder governance body.