| Date | Phase | Era | Slot Number | Epoch Number | Protocol Version | Ledger Protocol | Consensus Mechanism | Notes |
|---|---|---|---|---|---|---|---|---|
| 2017/09 | Byron | Byron | 0 | 0 | 0,0 | - | Ouroboros Classic | |
| 2020/02 | Byron | Byron | 3801600 | 176 | 1,0 | - | Ouroboros BFT | |
| 2020/07 | Shelley | Shelley | 4492800 | 208 | 2,0 | TPraos | Ouroboros Praos | |
| 2020/12 | Goguen | Allegra | 16588800 | 236 | 3,0 | TPraos | Ouroboros Praos | |
| 2021/03 | Goguen | Mary | 23068800 | 251 | 4,0 | TPraos | Ouroboros Praos | |
| 2021/09 | Goguen | Alonzo | 39916975 | 290 | 5,0 | TPraos | Ouroboros Praos | |
| 2021/10 | Goguen | Alonzo | 43372972 | 298 | 6,0 | TPraos | Ouroboros Praos | intra-era hardfork |
| 2022/09 | Goguen | Babbage | 72316896 | 365 | 7,0 | Praos | Ouroboros Praos | Vasil HF |
| 2023/02 | Goguen | Babbage | 84844885 | 394 | 8,0 | Praos | Ouroboros Praos | Valentine HF |