dnscontrol/documentation/functions/domain/A.md

name	parameters	parameter_types
A	name address modifiers...	name address modifiers... string string | number RecordModifier[]

A adds an A record To a domain. The name should be the relative label for the record. Use @ for the domain apex.

The address should be an ip address, either a string, or a numeric value obtained via IP.

Modifiers can be any number of record modifiers or JSON objects, which will be merged into the record's metadata.

D("example.com", REGISTRAR, DnsProvider("R53"),
  A("@", "1.2.3.4"),
  A("foo", "2.3.4.5"),
  A("test.foo", IP("1.2.3.4"), TTL(5000)),
  A("*", "1.2.3.4", {foo: 42})
);