🔍 Hostname Validator
Validate hostname and domain name formats according to RFC standards.
Hostname Rules (RFC 1123)
✓ Valid Characters
- Letters (a-z, A-Z)
- Numbers (0-9)
- Hyphens (-)
- Dots (.) as separators
✗ Invalid
- Cannot start or end with hyphen
- Cannot start with a number (in some contexts)
- No underscores
- No spaces or special characters
📏 Length Limits
- Maximum total length: 253 characters
- Maximum label length: 63 characters
- Minimum: 1 character per label