Domain name management agency ICANN:
ICANN (The Internet Corporation for Assigned Names and Numbers, ICANN) is a non-profit international organization, responsible for the Internet Protocol (IP) address space allocation, protocol identifier assignment, generic top-level domain (gTLD) and the national and regional top-level domain (ccTLD) system, management and the root server system management.
the global total of 13 sets of domain name root servers. 1 is a root server, placed in the United states. The remaining 12 are supplemented by root servers, of which the 9 placed in the United States, Europe, the 2 (located in the UK and Sweden), Asia, the 1 (in Japan), by the internet name and number distribution agency ICANN unified management.