Following is the complete (?) list of domain names and their registries. If some names are missing then let me know via comments
Top Level domains (gTLDs)
| .aero | Aviation |
Country Level Domains (ccTLDs)
| .ac | Ascension Island |
| .at | Austria |
| .be | Belgium |
| .de | Germany |
| .es | Spain |
| .gr | Greece |
| .pl | Poland |
| .pt | Portugal |
| .se | Sweden |