How many characters can a TLD contain at maximum?

The maximum number of characters allowed for a top-level domain (TLD) is 63 characters. This limit applies to both generic top-level domains (gTLDs) and country code top-level domains (ccTLDs).

This character limit includes letters (a-z), digits (0-9), and hyphens ("-"). However, a TLD cannot start or end with a hyphen, and consecutive hyphens are not allowed. Additionally, TLDs are not case-sensitive, so uppercase and lowercase letters are treated identically.

It's worth noting that while the maximum length of a TLD is 63 characters, most TLDs in common use are significantly shorter. For example, popular gTLDs like .com, .org, and .net consist of only three characters.

Domain name registrants should ensure that their chosen TLDs adhere to the maximum character limit and other requirements set by the relevant domain registry or registrar. Failure to comply with these requirements may result in registration errors or rejection of the domain name.