| Common Era | Present–201X C.E. |
| Crisis Era | 201X–2208 |
| Deterrence Era | 2208–2270 |
| Post-Deterrence Era | 2270–2272 |
| Broadcast Era | 2272–2332 |
| Bunker Era | 2333–2400 |
| Galaxy Era | 2273–unknown |
| Black Domain Era for DX3906 System | 2687–18906416 |
| Timeline for Universe 647 | 18906416–... |