# Archived Networks

> Historical reference for retired Mesa test networks — the preflight and MUT networks, their release versions, Docker tags, Debian channels, and fork values.

Canonical URL: https://docs.minaprotocol.com/network-upgrades/mesa/archived-networks

The Mesa test networks on this page are **archived**: they are no longer running, their builds are no longer supported, and the versions listed are historical. They are kept here as a reference for operators tracing old logs, images, or package pins.

For all current testing, use [Mesa Trail](/network-upgrades/mesa/mesa-trail).

## Preflight

An early Mesa test network, used to validate the upgrade before Mesa Trail.

| Field | Value |
| --- | --- |
| Pre-fork release | `4.0.0-preflight1-b649c79` |
| Stop-slot release | `4.0.0-preflight-stop-2967b39` |
| Post-fork (Mesa) release | `4.0.0-preflight-3f038cb` |
| Hard-fork time (UTC) | 2026-04-27 13:00 |
| Transaction protocol version after fork | 5.0.0 |
| o1js version targeting protocol v5.0.0 | `o1js@3.0.0-mesa.698ca` |
| Docker tag suffix | `-mesa` (for example `mina-daemon:4.0.0-preflight-3f038cb-bookworm-mesa`) |
| Debian channel | `preflight` on `unstable.apt.packages.minaprotocol.com` |
| Debian packages | `mina-mesa`, `mina-archive-mesa`, `mina-rosetta-mesa` |
| Seed nodes | `seed-1.mina-mesa-network.gcp.o1test.net`, `seed-2.mina-mesa-network.gcp.o1test.net` |

The preflight fork-schedule values are also recorded on the [Fork Schedule](/network-upgrades/mesa/fork-schedule) page.

## MUT

The MUT network (`mesa-mut`) was a Mesa upgrade-test network that exercised the full stop-slot → fork → post-fork sequence on `4.0.0-rc1` builds. Operator feedback from MUT fed directly into the upgrade procedures documented in these pages.

| Field | Value |
| --- | --- |
| Releases | `4.0.0-rc1` builds (for example `4.0.0-rc1-83b4654`, `4.0.0-rc1-mesa-mut-d7513d4`) |
| Docker tag suffix | `-mesa-mut` (for example `mina-daemon:4.0.0-rc1-83b4654-bullseye-mesa-mut`) |
| Seed nodes | `seed-1.mesa-mut.minaprotocol.com`, `seed-2.mesa-mut.minaprotocol.com` |

## Next Steps

- [Mesa Trail Network](/network-upgrades/mesa/mesa-trail) — the current test network: build matrix and setup
- [Mesa Upgrade Overview](/network-upgrades/mesa) — prepare for mainnet