Arbitrum

This page covers status and maintenance information for Arbitrum Networks including: Arbitrum One, Arbitrum Nova, Arbitrum Sepolia, and the Stylus Testnet. Arbiscan status updates and details for Arbitrum One and Nova can be found on the official Arbiscan status page, which will include information on planned outages.

For the status of network upgrades (e.g. ArbOS versions), please visit the network upgrades page.

Monitoring
October 13, 2025 at 9:02 PM
Monitoring
October 13, 2025 at 9:02 PM
We've identified the issue: a deviation occurred on Arbitrum Sepolia at block204606366 with nodes running on ARM and x86 reaching different results. Arbitrum Sepolia nodes running on ARM CPU architectures are asked to switch over to servers that use x86 CPU architectures instead. Node's who are synced to Arbitrum Sepolia using x86 architecutres are unimpacted and no action is required at this time.
Teams who wish to run ARM based nodes can do so once we release a new database snapshot to sync from (coming soon), alongside a new version of Nitro that addresses this fix (also coming soon).
Investigating
October 13, 2025 at 6:44 AM
Investigating
October 13, 2025 at 6:44 AM
We've received alerts and reports from Arbitrum Sepolia node operators relating to their nodes being unable to properly sync the chain. Our team is actively working on a fix and will communicate updates shortly.

Operational

Degraded performance

Recent notices

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Arbitrum - Status Page

Recent notices