That's a hard standardized limit, not merely a practical limit. Each label in a domain name (the parts after the :// and before the first slash, which are separ

That's a hard standardized limit, not merely a practical limit. Each label in a domain name (the parts after the :// and before the first slash, which are separated by dots) has a limit of 63 characters, and the full length of the domain name is limited to 253 characters.