The mainnet v0.11.0 upgrade has been completed successfully. Node 15 (account 0.0.18) has been brought online. See https://docs.hedera.com/guides/docs/release-notes/services#v-0-11-0 for the release notes.

Scheduled maintenance is currently in progress. We will provide updates as necessary.

Hedera will be upgrading Mainnet to v0.11.0 (release notes: https://hedera.io/release-notes) on Thursday, Feb 4th 2021 at 18:00 UTC. After this upgrade, the file formats for record streams, record stream signatures, event streams, and event stream signatures will be updated from their current version to version 5; please reference https://docs.hedera.com/guides/docs/record-and-event-stream-file-formats for notable changes. Changes are currently available on testnet. In addition, mirrornode software users will require an update to v0.26.0 to accommodate for these format changes, available at https://github.com/hashgraph/hedera-mirror-node/releases.