A Record

Definition

An A (Address) Record is a DNS record that maps a domain name to an IPv4 address. It sits in this flow: Domain → Nameserver → DNS Zone → A Record → IP Address → Web Server

• Its role is to tell browsers which server IP hosts the website.

What Problem It Solves

• Humans remember names like example.com, not IP addresses like 192.168.1.10.
• The A Record connects the domain name to the correct server.
• It allows users to access a website using an easy-to-remember name.

What Happens If Not Used

• DNS cannot find the server that hosts the website.
• Visitors may see errors such as "Site can't be reached".
• The domain exists, but no path leads to the web server.

Easy Wording

An A Record is the DNS entry that tells the internet which server IP a website lives on.

Layman Example

• A domain is a person's name.
• The A Record is the person's home address.
• Without the address, the mail carrier knows the name but cannot deliver the letter.

Technical Example

• User enters example.com in a browser.
• Browser asks DNS for the website location.
• Nameserver checks DNS records.
• DNS finds: example.com → A Record → 203.0.113.10
• DNS returns the IP address.
• Browser connects to 203.0.113.10.
• Web server sends the website. Without A Record: Browser → DNS → No IP Found → Website Fails to Load. With A Record: Browser → DNS → A Record → IP Address → Server → Website Loads.