Hedera: Mainnet transitions to Block Stream - Oct 2026

Hedera announces its mainnet transition from Record Stream to Block Stream for October, after a testnet transition in September. The announcement asks mirror-node operators to prepare and outlines Block Streams, Block Nodes, and the operational steps needed for the cutover.The cutover changes how network data is produced and consumed. Mirror-node operators and services that rely on Hedera data streams will need to align with the new architecture, which may require changes to their operational setup and data-processing workflows.The transition makes the new stream structure available on mainnet, but the announcement does not demonstrate that operators or downstream services have completed migration or that adoption has already occurred.Run a Hedera mirror node?The Record Stream → Block Stream cutover is coming: Testnet in September, Mainnet in October.Join the live info session on Block Streams, Block Nodes, and what operators need to do to be ready 👇🔗