Can a TLD contain spaces?

No, a top-level domain (TLD) cannot contain spaces. In fact, spaces are not allowed in any part of a domain name, whether it be the TLD, second-level domain (SLD), or any other subdomain.

### Domain Name Rules
- **Characters Allowed**: Domain names can only include letters (a-z), numbers (0-9), and hyphens (-). They cannot include spaces, special characters (like !, @, #, etc.), or underscores (_).
- **Hyphen Restrictions**: While hyphens are allowed, they cannot be placed at the beginning or end of a domain name segment, and domain names cannot have consecutive hyphens (e.g., `--`).
- **Length Limits**: TLDs typically have length restrictions, usually between 2 to 63 characters.

### Example of Valid and Invalid Domain Names
- **Valid**: `example.com`, `my-site.org`, `123domain.net`
- **Invalid**: `example .com` (contains a space), `my_site.org` (contains an underscore), `example!.com` (contains a special character)

### DNS Syntax
The DNS (Domain Name System) follows a strict syntax for domain names to ensure proper functioning and resolution across the internet. Spaces and disallowed characters can lead to misinterpretation and resolution failures within the DNS infrastructure.

TLDs and all parts of a domain name must adhere to specific character rules that prohibit spaces and certain other characters, ensuring uniformity and reliability in domain name resolution.