How to set a DNS A record?

The "A" stands for "address" and this is the most fundamental type of DNS record: it indicates the IP address of a given domain. For example, if you pull the DNS records of cloudflare.com, the A record currently returns an IP address of: 104.17.210.9.

A records only hold IPv4 addresses. If a website has an IPv6 address, it will instead use an "AAAA" record.

Here is an example of an A record:

Instead of 212.112.121.100 you should use your IPv4 or the one we provide (if you are our customer).

The vast majority of websites only have one A record, but it is possible to have several. Some higher profile websites will have several different A records as part of a technique called round robin load balancing, which can distribute request traffic to one of several IP addresses, each hosting identical content.

When are DNS A records used?

The most common usage of A records is IP address lookups: matching a domain name (like "cloudflare.com") to an IPv4 address. This enables a user's device to connect to your IRC server, without the user memorizing and typing in the actual IP address. The user's IRC client automatically carries this out by sending a query to a DNS resolver.

 

  • A record, dns
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