Bithumb will temporarily suspend ThunderCore (TT) withdrawals at 4:00 a.m. UTC on Aug. 28 to support a planned network transition. The exchange has not provided a restart time, and users should monitor official notices. Separately, Upbit is scheduled to stop TT withdrawals and trading in the TT/KRW and TT/BTC pairs at 09:00 on Sept. 1, 2026, after citing ThunderCore’s emergency network shutdown.