whatsmydns.net - DNS Propagation Checker
  1. What's My DNS?
  2. DNS Records
  3. A Records

DNS A Record

A records, known as Address records are used to store IP address information for a domain name.

A records can only store IPv4 IP addresses (e.g. 192.168.2.1). In order to store IPv6 addresses, an AAAA record must be used.

Most websites only need to have a single A record for a given identifier, however it is possible to provide multiple A records.

Example A record

An example A record may look like the following:

Record Type Value TTL
www A 192.168.2.1 3600

www represents identifier of the record. To set the value for the root of the domain you must use @.

A is the record type.

192.168.2.1 is the value of the record. This must be an IPv4 address.

3600 is the TTL (time to live) of the record in seconds, this example represents 1 hour. This means that when a record has had updates made to it, then it will take 1 hour to update.

Multiple A records

When multiple A records are associated with the same domain record, one is used at random - this can be useful for larger websites or services as a technique to load balance traffic across multiple servers where a single server or network device cannot handle the traffic alone.

Record Type Value TTL
www A 192.168.2.1 3600
www A 192.168.2.2 3600

How to check A records?

Use the A Record Lookup tool to check a domain name's A records.

Use the DNS Lookup tool to check all DNS record types.

Use the Global DNS Checker tool to check DNS records from all around the world.