DNS Records

TXT

The text record can hold arbitrary non-formatted text string. Typically, the record is used by Sender Policy Framework (SPF) to prevent fake emails to appear to be sent by you.

SRV

A Service record (SRV record) is a specification of data in the Domain Name System (DNS) defining the location (i.e. the hostname and port number) of servers for specified services. It is defined in RFC 2782

A

Address Mapping records (A) The record A specifies IP address (IPv4) for given host. A records are used for conversion of domain names to corresponding IP addresses.

CNAME

Canonical Name records (CNAME) The CNAME record specifies a domain name that has to be queried in order to resolve the original DNS query. Therefore CNAME records are used for creating aliases of domain names.

PTR Record

Reverse-lookup Pointer records (PTR) As opposed to forward DNS resolution (A and AAAA DNS records), the PTR record is used to look up domain names based on an IP address

HINFO

Host Information records (HINFO) HINFO records are used to acquire general information about a host. The record specifies type of CPU and OS. The HINFO record data provides the possibility to use operating system specific protocols when two hosts want to communicate

AAAA

IP Version 6 Address records (AAAA) The record AAAA (also quad-A record) specifies IPv6 address for given host. So it works the same way as the A record and the difference is the type of IP address.

ISDN

Integrated Services Digital Network records (ISDN) The ISDN resource record specifies ISDN address for a host. An ISDN address is a telephone number that consists of a country code, a national destination code, a ISDN Subscriber number and, optionally, a ISDN subaddress

MX Record

Mail exchanger record (MX) The MX resource record specifies a mail exchange server for a DNS domain name. The information is used by Simple Mail Transfer Protocol (SMTP) to route emails to proper hosts

NS

Name Server records (NS) The NS record specifies an authoritative name server for given host.

SOA

The record specifies core information about a DNS zone, including the primary name server, the email of the domain administrator, the domain serial number, and several timers relating to refreshing the zone.