Ethereum Istanbul Upgrade
Scheduled Maintenance Report for
The scheduled maintenance has been completed.
Posted Dec 08, 2019 - 09:30 GMT+08:00
In progress
Scheduled maintenance is currently in progress. We will provide updates as necessary.
Posted Dec 08, 2019 - 06:30 GMT+08:00
We will be undergoing scheduled maintenance at this time to support the Istanbul protocol upgrade. During this time, we will be halting ETH wallet activity -- including sending, receiving, and converting ETH on, as well as ETH transfers between and Coins Pro.

You can read the following FAQ for more information:
Posted Dec 02, 2019 - 06:30 GMT+08:00
This scheduled maintenance affected: External Ethereum Transfers (Incoming from External Wallets, Outgoing to External Wallets).