An entry in a zone file that enables the Domain Name System to resolve the names of host servers within a domain. Types of RRs commonly found in a zone file are:
- NS records, which identify authoritative name servers for the domain itself and for any subdomains to which administrative authority has been delegated.
- MX records, which identify servers that handle email messages on behalf of the domain.
- A and AAAA records, which provide the IPv4 and IPv6 addresses (respectively) for a specified hostname.