Manta BridgeIs Manta Atlantic shutting down?
Yes. Manta Atlantic is being deprecated in 2026, while Manta Pacific remains the active Ethereum L2 path for the Manta ecosystem.
Manta Atlantic is the older Manta Network chain in the Polkadot ecosystem. The official Manta Atlantic migration FAQ says the Atlantic parachain slot will not be renewed and that resources are being consolidated into Manta Pacific.
The key distinction is chain identity: Atlantic is the Polkadot parachain, while Pacific is the Ethereum L2. Manta Bridge is the official native bridge for moving ETH and Ethereum ERC-20 tokens between Ethereum Mainnet and Manta Pacific, Manta Network's Celestia-powered Ethereum L2.
What are the key dates?
The two dates holders should remember are March 20, 2026 for inbound closure and around August 1, 2026 for the natural parachain-slot expiry.
The exact final block can vary by a few days because parachain timing depends on block production. Use August 1, 2026 as the named natural expiry, but treat late July through early August 2026 as the shutdown window.
| Date or window | Event | What it means for Atlantic holders |
|---|---|---|
| March 20, 2026Inbound transfers closed | Cross-chain bridge inbound channels into Atlantic closed. | You should not try to bridge assets into Atlantic. The remaining practical path is out of Atlantic during the migration window. |
| June 2026Read-only stage | The migration FAQ describes Atlantic entering a read-only mode before expiry. | Regular on-chain activity becomes constrained. Migration-related actions are the priority. |
| Late July – early August 2026Slot expiry window | Atlantic stops producing blocks when the parachain slot expires. | Finish holder-controlled migration before the slot expiry instead of waiting for final-day timing. |
| August 1, 2026Natural expiry named by Manta | Manta names August 1, 2026 as Atlantic's natural parachain-slot expiry. | Use this as the planning deadline, with a buffer for wallets, unbonding, exchange withdrawals, and congestion. |
| After shutdownHistorical handling | Manta's FAQ says a snapshot and archive access are part of the post-shutdown plan. | MANTA treatment differs from non-MANTA assets. Do not assume every asset receives the same fallback path. |
Does this affect Manta Pacific?
No. The Atlantic deprecation does not mean Manta Pacific is closing, and it does not shut down the native bridge route to Pacific.
The official docs list Manta Atlantic Mainnet as a Polkadot parachain with Para ID 2104 in the Manta Atlantic network information. Manta Pacific is a separate Ethereum L2, so the Atlantic shutdown is not a Pacific shutdown.
For users moving ETH or Ethereum ERC-20 tokens between Ethereum Mainnet and Manta Pacific, the relevant product remains Manta Bridge. If your question is about the active Pacific bridge rather than Atlantic migration, review bridge safety before signing transactions.
What should Manta Atlantic holders do?
Atlantic holders should identify what they hold, avoid inbound transfers, and migrate eligible assets before the parachain slot expires.
Check the network
Confirm whether your wallet or exchange balance is actually on Atlantic. Pacific balances are not part of the Atlantic shutdown.
Plan the route
Manta's FAQ describes two broad exits: Atlantic to Manta Pacific, or Atlantic to Polkadot and other parachains by XCM.
Act before expiry
Inbound closed on March 20, 2026. The remaining decision is how and when to move assets out, not whether to send more in.
If you want the Pacific path, start with the sibling guide on how to migrate off Atlantic, then verify every final URL and wallet prompt against Manta's official migration materials.
Where is the official announcement?
The source to bookmark is Manta Network's Atlantic migration FAQ, which states the shutdown reason, the key dates, the inbound-transfer closure, and migration paths.
Use this page as a concise status guide, but treat the official Manta FAQ as the final source for operational changes. The page was last verified in July 2026 and should be refreshed quarterly or sooner if Manta changes the migration instructions.
Pacific continues. If your goal is to use the active Ethereum L2 route, open the official bridge app and confirm you are working with the Pacific route, not the deprecated Atlantic network.
Open BridgeFor more route explainers, see all Manta Bridge guides. Near the Pacific route, the homepage for Manta Bridge keeps the active bridge context separate from Atlantic shutdown guidance.
When exactly does Atlantic end?
Manta names August 1, 2026 as Atlantic's natural parachain-slot expiry, while also saying the exact stop can land around late July to early August 2026 because block production affects the final timing.
Is Manta Pacific closing too?
No. Manta Pacific is the Ethereum L2 and is not being shut down by the Atlantic deprecation. Manta says future development is focused on Pacific.
What happens to MANTA on Atlantic?
Manta's FAQ tells holders to migrate. It also describes a post-shutdown snapshot and planned 1:1 treatment for unmigrated MANTA, while warning that non-MANTA assets need holder-controlled migration before the deadline.
Can you still bridge into Atlantic?
No. Inbound transfers to Atlantic closed on March 20, 2026. Users should not plan any workflow that requires sending assets into Atlantic after that date.
Where is the migration guide?
Start with this site's guide to migrating off Atlantic, then verify the final instructions in Manta's official migration FAQ and any current app notices before signing.