A record is a line in the zone data that maps an FQDN to an IP address. * Also known as forward lookup zone records.
A#
A Record * Points the primary domain (FQDN) and any subdomains to a specific IP address. * Often this includes the 'www' subdomain.
SOA#
Start of Authority * Every forward lookup zone requires a SOA record that defines the primary name server in charge of the forward lookup zone.
NS#
Name Server Record * Primary and usually secondary name servers for the domain.
CNAME#
Canonical Name Record * Acts like an alias. Basically points one FQDN to another FQDN.
AAAA#
AAAA Record * Equivalent of an 'A' record but reserved for IPv6 addresses.
MX#
MX Record * Used exclusively by SMTP servers to determine where to send mail.
SRV#
SRV Record
* Supports any type of server
* Syntax:
_service.proto.name. TTL IN SRV priority weight port target
+ service Name of the service supported by this record
+ proto TCP or UDP
+ name The domain name for this server (ends with a period)
+ TTL Time to live in seconds
+ priority The priority of the target host; used when multiple servers present.
+ weight An arbitrary value to give certain services priority over others
+ port The TCP or UDP port on which the service is found
+ target The FQDN of the machine providing the service, ending in a dot
* Example:
_sip.tcp.testserve.com. 86400 IN SRV 0 5 5060 sipserver.mikemeyers.com.
TXT#
TXT Record * Freeform type of record that can be used for anything * Often SPF/DMARC/DKIM records are of this type * Also, DCV records can also be of this type
PTR#
Pointer Record * Reverses the network ID and add a unique domain called "in-addr.arpa" to create the zone. This points to a FQDN and allows for reverse lookups by IP address.