Root Zone
Root Zone refers to the top of the Domain Name System (DNS). It contains all the top level domain name delegations such as the gTLDs .com, .net, .org, .jobs, all the country code top level domains (ccTLDs) for example .us, .uk .ph including the entire list of all the root servers.[1]
Root Zone Management
The management of the DNS root zone was handled by the Internet Assigned Numbers Authority (IANA). Its functions include assigning the operators of top level domains and maintenance of the technical and administrative details of the TLDs.[2]
Root Zone Data Base
The data base of the root zone contains the records of the operators of the gTLDs and ccTLDs.