KuCoin to End Support for UOS and REACT on Specific Networks
KuCoin will stop deposits and withdrawals for Ultra (UOS) on Ultra Mainnet and Reactive Network (REACT) on Reactive Mainnet on September 9, 2026.
Source-checked briefing: prepared from the official notice cited below and checked for source, date, duplication, and risk language. No individual editor review is claimed. Methodology
KuCoin announced it will discontinue deposit and withdrawal services for Ultra (UOS) on the Ultra Mainnet and Reactive Network (REACT) on the Reactive Mainnet at 8:00 UTC on September 9, 2026. Deposits made via these networks after that time will not be processed and may result in asset loss. The announcement does not state that users must take any immediate action; however, users who wish to use these tokens on other supported networks can do so before the cutoff.
- 01
KuCoin will discontinue deposit and withdrawal services for Ultra (UOS) on the Ultra Mainnet and Reactive Network (REACT) on the Reactive Mainnet.
- 02
The discontinuation takes effect at 8:00 UTC on September 9, 2026.
- 03
Deposits made via the affected networks after the cutoff will not be processed and will lead to asset loss.
Key timeline
Announcement published on KuCoin's website.
Deposit and withdrawal services for UOS on Ultra Mainnet and REACT on Reactive Mainnet are discontinued.
Who may be affected
- KuCoin users holding Ultra (UOS) on the Ultra Mainnet.
- KuCoin users holding Reactive Network (REACT) on the Reactive Mainnet.
- Users who intend to deposit these tokens via the affected networks after the cutoff.
Impact analysis
The confirmed change directly affects users who deposit or withdraw UOS on the Ultra Mainnet and REACT on the Reactive Mainnet. After the cutoff, any deposits made via these networks will not be processed and could result in asset loss. The announcement clarifies that the token listing status remains unchanged, and users can still transact these tokens on other supported networks. Therefore, the operational impact is limited to network-specific deposit and withdrawal functionality. Users who need to use these networks should complete their transactions before the deadline to avoid potential loss. The announcement does not mention any impact on trading, staking, or other features.
What the announcement does not say
The announcement does not specify why support is being discontinued, whether there are any alternative networks for these tokens, or if there are any fees or processing times associated with withdrawals on other networks. It also does not clarify if there are any other tokens affected beyond the two listed.
Risk notes
- Deposits made via the affected networks after September 9, 2026, 8:00 UTC will not be processed and will lead to asset loss.
- The announcement does not address the security of user funds or accounts; no security issues are mentioned.
- Users who do not use the affected networks are not directly impacted by this change.
- The announcement does not provide details on the reason for the discontinuation or any potential impact on token value.
- This article is for verification of official exchange announcements only and does not constitute investment or trading advice.
This article is for information only and is not investment, legal, or tax advice. Digital assets are volatile and may result in loss of principal.
Frequently asked questions
What happens if I deposit UOS or REACT on the affected networks after the cutoff?
According to the announcement, deposits made via the affected networks after the cutoff will not be processed and will lead to asset loss.
Can I still trade UOS and REACT on KuCoin after the change?
The announcement states that ceasing support for these networks does not affect the token's listing status on KuCoin as of the announcement. It does not explicitly mention trading, but the listing status remains unchanged.
Are there other networks I can use to deposit or withdraw these tokens?
Yes, the announcement says users can still deposit and withdraw the tokens on other networks supported by KuCoin. It advises navigating to Assets > Main Account > Withdraw to select other available networks.
Official sources
Collected material is used only for fact checking. If this page differs from the original announcement, the official page controls.