All Systems Operational

Flow Testnet Operational
Flow mainnet core components Operational
Collection Finalization Operational
Block Finalization Operational
Transaction Execution Operational
Block Sealing Operational
Flow mainnet Access APIs Operational
GRPC API Operational
GRPC Web API Operational
REST API Operational
EVM Gateway Operational
Operational
Degraded Performance
Partial Outage
Major Outage
Maintenance

Scheduled Maintenance

Flow Mainnet Zero Downtime Height Co-ordinated Upgrade Feb 24, 2026 18:00-18:30 UTC

Flow Mainnet will undergo a scheduled Height-Coordinated Upgrade (HCU).

This upgrade will use the new Zero-Downtime HCU method, which allows the network to be upgraded while transaction execution continues almost uninterrupted. No downtime is expected, though users may notice a brief impact lasting a few seconds during the upgrade window.

Previous HCUs resulted in approximately 8 to 9 minutes of downtime. This new method significantly reduces that impact.

We will monitor the network closely throughout the upgrade.
Posted on Feb 23, 2026 - 22:48 UTC
Feb 24, 2026
Flow Mainnet Network Issue
Resolved - The incident has been resolved and the network has resumed.
Feb 24, 05:13 UTC
Monitoring - The root cause of the issue has been resolved, and block production has resumed, though it is currently progressing slowly. Consensus node operators are actively upgrading their nodes, and once a majority of the consensus nodes in the network have completed the update, block sealing is expected to return to normal performance.
Feb 24, 04:59 UTC
Identified - Flow is still in maintenance as the team works to restore full operations. The issue was caused by an incomplete node update in preparation for tomorrow’s height coordinated upgrade, which triggered a consensus safety mechanism that halted block sealing. Flow engineers are actively working on a fix, and the next update will be shared at 10 PM PT.
Feb 24, 04:07 UTC
Investigating - Block sealing on Flow mainnet has stopped. We are investigating the issue.
Feb 24, 01:15 UTC
Feb 23, 2026

No incidents reported.

Feb 22, 2026

No incidents reported.

Feb 21, 2026

No incidents reported.

Feb 20, 2026

No incidents reported.

Feb 19, 2026

No incidents reported.

Feb 18, 2026
Flow Testnet Zero Downtime Height Co-ordinated Upgrade Test
Completed - The height coordinated upgrade (HCU) on testnet is now complete.
Testnet was successfully upgraded without any downtime 🎉🎉.
Feb 18, 22:59 UTC
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Feb 18, 19:30 UTC
Scheduled - We will be testing a zero-downtime height coordinated upgrade on Testnet.

Zero-downtime upgrade is a new network feature that allows the network to perform a height coordinated upgrade without pausing transaction execution.

There are no changes to node software and no action is required from node operators.

This test has no impact on Mainnet.
Feb 18, 17:44 UTC
Feb 17, 2026

No incidents reported.

Feb 16, 2026

No incidents reported.

Feb 15, 2026

No incidents reported.

Feb 14, 2026

No incidents reported.

Feb 13, 2026
Flow mainnet height co-ordinated upgrade
Completed - The HCU is now complete.
Block Height: 142100300
If you are running an access or a verification node, please update to docker tag v0.46.1-rc.1
Feb 13, 16:33 UTC
Update - The mainnet height coordinated upgrade (HCU) is underway.
Block height for the HCU is 142100300.
The execution nodes are now restarting with the new node software.
Feb 13, 16:27 UTC
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Feb 13, 16:00 UTC
Scheduled - Flow mainnet will undergo a height-coordinated upgrade.

The upgrade will NOT cause any network downtime except for transaction execution being paused for a few minutes while the execution nodes restart.
Feb 13, 14:20 UTC
Flow Testnet Height Co-ordinated Upgrade
Completed - The scheduled maintenance has been completed.
Feb 13, 03:43 UTC
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Feb 13, 02:40 UTC
Scheduled - Flow Testnet will undergo a height-coordinated upgrade.

The upgrade will NOT cause any network downtime except for transaction execution being paused for a few minutes while the execution nodes restart.

No impact on mainnet
Feb 13, 02:39 UTC
Feb 12, 2026
Flow Testnet Network Upgrade
Completed - The EVM endpoint is up and running as well.
Flow Testnet is now fully functional.
Feb 12, 21:28 UTC
Update - The Access node endpoint is up.
We are working on getting the EVM Gateway up and running.
Feb 12, 06:20 UTC
Verifying - The network upgrade is complete. We are working on getting the public endpoint restored.
Feb 12, 05:32 UTC
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Feb 12, 04:30 UTC
Scheduled - Flow Testnet will be undergo a network upgrade (spork) to recover from the current issue.

Thanks,
Flow team
Feb 12, 04:18 UTC
Flow Testnet Network Issue
Postmortem - Read details
Feb 12, 21:30 UTC
Resolved - The issue has been resolved with a full network upgrade (spork) on testnet
Feb 12, 05:33 UTC
Update - Flow Testnet will be undergoing a network upgrade (spork) to recover from the current issue.
Feb 12, 04:17 UTC
Investigating - Block production on testnet has halted.
We are currently investigating the issue.

No impact on mainnet.
Feb 12, 03:21 UTC
Feb 11, 2026

No incidents reported.

Feb 10, 2026

No incidents reported.

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