> ## Documentation Index
> Fetch the complete documentation index at: https://docs.hyperlane.xyz/llms.txt
> Use this file to discover all available pages before exploring further.

# Deprecated Chains

> Chains being removed from Abacus Works agent operations

Abacus Works is winding down its [Relayer](/docs/protocol/agents/relayer) and [Validator](/docs/protocol/agents/validators) operations for the chains listed below.

**What this means:**

* **Relayer** — Once removed, messages will not be automatically delivered. The community can [run their own Relayer](/docs/operate/relayer/run-relayer) to keep message delivery operational.
* **Validators** — Abacus Works will wind down its Validators for these chains. Chain teams and ecosystem partners can [run their own Validator](/docs/operate/validators/run-validators) and [reach out to the Abacus Works team](https://github.com/hyperlane-xyz/hyperlane-monorepo/discussions) to update the [default ISM](/docs/reference/addresses/validators/mainnet-default-ism-validators).

<Warning>
  If you're building on any of these chains, plan your migration before the last supported date. After the listed date, Abacus Works will no longer operate agents for that chain. To take over agent operations, refer to the [Validator](/docs/operate/validators/run-validators) and [Relayer](/docs/operate/relayer/run-relayer) guides.
</Warning>

| Chain         | Domain ID  | Chain ID   | Last Supported Date |
| ------------- | ---------- | ---------- | ------------------- |
| Arbitrum Nova | 42170      | 42170      | May 10, 2026        |
| Aurora        | 1313161554 | 1313161554 | May 10, 2026        |
| B² Network    | 223        | 223        | May 10, 2026        |
| B3            | 8333       | 8333       | May 10, 2026        |
| Degen         | 666666666  | 666666666  | May 10, 2026        |
| Dogechain     | 2000       | 2000       | May 10, 2026        |
| Everclear     | 25327      | 25327      | May 10, 2026        |
| Fantom Opera  | 250        | 250        | May 10, 2026        |
| Fluence       | 9999999    | 9999999    | May 10, 2026        |
| Harmony One   | 1666600000 | 1666600000 | May 10, 2026        |
| Merlin        | 4200       | 4200       | May 10, 2026        |
| MilkyWay      | 1835625579 | milkyway   | May 10, 2026        |
| Molten        | 360        | 360        | May 10, 2026        |
| Moonbeam      | 1284       | 1284       | May 10, 2026        |
| Polygon zkEVM | 1101       | 1101       | May 10, 2026        |
| Polynomial    | 1000008008 | 8008       | May 10, 2026        |
| Scroll        | 534352     | 534352     | May 10, 2026        |
| Story Mainnet | 1514       | 1514       | May 10, 2026        |
| Superposition | 1000055244 | 55244      | May 10, 2026        |
| Tangle        | 5845       | 5845       | May 10, 2026        |
| Zero Network  | 543210     | 543210     | May 10, 2026        |
| Zora          | 7777777    | 7777777    | May 10, 2026        |
| Zircuit       | 48900      | 48900      | June 20, 2026       |

*Chain and domain IDs sourced from the [Hyperlane Registry](https://github.com/hyperlane-xyz/hyperlane-registry).*