Process Software - Domain Name System (DNS) Index

A (Address) Record

The A record (address record) yields an IP address that corresponds to a host name. There can be multiple IP addresses corresponding to a single host name; there can also be multiple host names each of which maps to the same IP address.

The format is:



Host.domain.name.    IN      A       nnn.ooo.ppp.qqq

There must be a valid A record in the dns for Host.domain.name in order for a command such as TELNET Host.domain.name to work (or a CNAME that points to a hostname with a valid A record). Also see MX records.