Who Run The Internet?

DNS Records

Not Really, but it makes it easy

A Records

An A record maps an IPv4 address to a domain name. This determines where to direct any requests for a domain name.

AAAA Records

An AAAA record, also called a Quad A record, maps an IPv6 address to a domain name. This determines where to direct requests for a domain name in the same way that an A record does for IPv4 addresses.


A CNAME record defines an alias for an A record; it points one domain to another domain instead of to an IP address. When the associated A record’s IP address changes, the CNAME will follow to the new address.

MX Records

An MX record specifies the mail servers responsible for accepting email on behalf of your domain. Providers often make multiple name servers available so that if one is offline, another can respond. Each server needs its own MX record.

TXT Records

A TXT record is used to associate a string of text with a hostname. These are primarily used to verify that you own a domain.

NS Records

An NS record specifies the name servers, or servers that provide DNS services, for a domain or subdomain. You can use these to direct part of your traffic to another DNS service or to delegate DNS administration for a subdomain.

SRV Records

A SRV record specifies a hostname and port number for a specific service to direct certain types of traffic to particular servers. Some services, like SIP (Session Initiation Protocol) and XMPP/Jabber (Extensible Messaging and Presence Protocol), require SRV records.

CAA Records

A CAA record specifies which certificate authorities are permitted to issue certificates for a domain. You can use them to reduce the risk of unintended certificate mis-issue. This section is only a brief overview; our detailed CAA record documentation has more information.

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