| co.uk | Commercial entities and purposes |
| ltd.uk | Private limited companies |
| me.uk | Personal names |
| net.uk | Internet Service Providers' infrastructure |
| org.uk | Not-for-profit entities |
| plc.uk | Public limited companies |
| ac.uk | Higher and further education and research institution |
| gov.uk | National, regional, and local government bodies and agencies |
| mod.uk and mil.uk | Military and related purposes |
| nhs.uk | National Health Service |
| police.uk | Police forces |
| nic.uk | Network use only |
| sch.uk | Schools |