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. 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 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. 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 3600
www A 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.