What is a zone in the Domain Name Service?

In the Domain Name System (DNS), a zone is a distinct portion of the domain namespace that is managed by a specific organization or administrator. It contains DNS records associated with a domain, such as A records, CNAME records, and MX records, which help translate domain names into IP addresses and manage email routing. A zone can encompass an entire domain or a subdomain, and it is defined in zone files that specify how the DNS information is structured and served. Zone management allows for decentralized administration of DNS, enabling different entities to maintain their own records while contributing to the overall hierarchy of the DNS.