Subdomain
A subdomain is the part before the main domain (e.g. blog in blog.example.com).
Domain~1 min read
In plain English
The part in front of the main domain name—like “blog” in blog.example.com or “mail” in mail.example.com. Each can have its own DNS and server.
A subdomain is a prefix to a domain name, creating a distinct address (e.g. blog.example.com, api.example.com). Subdomains have their own DNS records (often CNAME or A records) and can point to different servers or services.
Our DNS and WHOIS tools let you inspect records for both the main domain and its subdomains.