A record
type of resource record in the Domain Name System (DNS)
In the Domain Name System, an A record is something that changes a domain name into a 32-bit IP address (or IPv4 address). A domain can have many A records, for example, the domain example.com could have an A record for www.example.com that points to the IP 127.0.0.1, and another A record for mail.example.com that points to the IP 127.0.0.2.
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