• Domain Name Service

dns
  1. Help Center
  2. Domain Name Service
  3. User Guide
  4. Overview
  5. Basic Concepts
  6. Domain Name Format

Domain Name Format

A valid domain name meets the following requirements:

  • A domain name contains only letters, digits, and hyphens (-) and cannot start or end with a hyphen.
  • A domain name cannot start or end with a hyphen.
  • A domain name label cannot exceed 63 characters.
  • Every two labels are separated using a dot (.), and the total length of a domain name, including the dot added at the end by default, cannot exceed 254 characters.

For example, example.com and www.example.com are valid domain names.