The uk top level domain code is separated into a number of second level domains, abbreviated to SLDs. People are encouraged to register a domain name within the SLD that corresponds to their type of activity.

There are two types of second level domain, those that we manage directly and those that are delegated to other organisations to manage.

The second level domains that we manage are:

• co.uk for commercial enterprises (the largest SLD in the UK)
• me.uk for personal domains
• org.uk for non-commercial organisations
• ltd.uk and plc.uk for registered company names only
• net.uk for Internet Service Providers
• sch.uk for schools