What is A Record in Route 53: Simple Explanation and Example

An A record in AWS Route 53 is a DNS setting that links a domain name to an IPv4 address. It tells the internet where to find your website or service by pointing the domain to the server's IP address.

How It Works

Think of an A record like the address label on a letter. When you send a letter, the address tells the post office where to deliver it. Similarly, an A record tells the internet where to send requests for your website by linking your domain name to a specific IP address.

In AWS Route 53, when someone types your domain name in a browser, Route 53 looks up the A record and finds the IPv4 address of your server. Then, it directs the browser to that server so the website loads. This process happens very fast, making sure users reach your site smoothly.

Example

This example shows how to create an A record in Route 53 using AWS CLI to point example.com to the IP address 192.0.2.44.

json

{
  "Comment": "Create A record for example.com",
  "Changes": [
    {
      "Action": "CREATE",
      "ResourceRecordSet": {
        "Name": "example.com.",
        "Type": "A",
        "TTL": 300,
        "ResourceRecords": [
          {
            "Value": "192.0.2.44"
          }
        ]
      }
    }
  ]
}

Output

Change request submitted successfully. The A record for example.com now points to 192.0.2.44.

When to Use

Use an A record when you want to connect your domain name to a specific server's IPv4 address. This is common when hosting a website, web app, or any service that needs a fixed IP address.

For example, if you run a website on a server with IP 203.0.113.10, you create an A record so visitors typing your domain reach that server. It's also useful for pointing subdomains like blog.example.com to different servers.

Key Points

• An A record links a domain to an IPv4 address.
• It is essential for directing internet traffic to your server.
• TTL (Time to Live) controls how long DNS caches the record.
• Route 53 manages these records for domains registered or hosted in AWS.

Key Takeaways

An A record connects your domain name to an IPv4 address in Route 53.

It directs users to the correct server when they visit your website.

Use A records to point domains or subdomains to fixed IP addresses.

TTL controls how quickly changes to the A record take effect.

Route 53 lets you manage A records easily for your AWS-hosted domains.