The number of nodes in the Hedera mainnet (beta) pre-version 1.0, operated by members of the Governing Council, can be found at https://status.hedera.com/.
Some Council members are running their nodes independently while, for a transition period, some members are running their nodes with assistance from Hedera’s developer operations team.
In addition, anyone can stand up a mirror node through one-click deploy on Google Cloud Platform or manually configure one locally; instructions for setting up a mirror node can be found at https://docs.hedera.com/guides/mirrornet/run-your-own-beta-mirror-node.
The network will experience brief periods of scheduled downtime for maintenance.