This Wiki page serves as a list of claimed ZXT owner IDs.
| Start | End | Owner | Purpose (optional) |
|---|---|---|---|
| 00000000 | 000000FF | Reserved | “Standard” extensions |
| 00000100 | 00000100 | SmilyMZX | Reserved for SmilyMZX's extensions. |
| 00000101 | 0000A51D | Unclaimed | |
| 0000A51E | 0000A51E | asie | General |
| 0000A51F | 00022037 | Unclaimed | |
| 00022038 | 00022038 | zzo38 | |
| 00022039 | 00073872 | Unclaimed | |
| 00073873 | 00073873 | ??? | WeaveZZT-derived extensions |
| 00073874 | 79656D73 | Unclaimed | |
| 79656D74 | 79656D74 | GreaseMonkey | |
| 79656D75 | FFFFFEFF | Unclaimed | |
| FFFFFF00 | FFFFFFFF | Reserved | Private/personal extensions |