South Korea's Financial Intelligence Unit ordered domestic access blocks on 27 unregistered crypto exchange websites, including KuCoin, MEXC, Phemex, BingX, and BitMart, the regulator disclosed on October 13. The country's communications review body approved the blocks after reviews on October 6 and 7. It's the clearest sign yet that Korean regulators have stopped waiting for court rulings or confirmed user losses before cutting off offshore platforms.
The list and how the blocks work
Sites hosted abroad get access blocks — Korean users simply can't reach them. Platforms with servers or operators inside Korea face service termination outright, which is a harsher outcome. The FIU had already asked Google and Apple to block new installs and updates of unregistered exchange apps. That request wasn't new. Google Play restricted 17 such platforms back in March 2025, KuCoin and MEXC among them, so the app-store squeeze has been building for over a year.
The FIU says it will keep seeking blocks as it detects unregistered activity, pending the review body's approval each time. And it plans to chase replacement sites that relaunch under new addresses — an acknowledgment that a blocked domain isn't always a dead one.
Why the FIU stopped waiting
The old playbook required court rulings or confirmed user losses before action. That's gone. Regulators now judge whether an offshore platform operates locally by weighing three things: Korean-language sites, marketing aimed at Koreans, and won payment support. Hit enough of those, and the block request goes in.
Operating without registration in Korea can bring up to five years in prison or a 50 million won fine. The FIU has already referred 44 unregistered operators to investigators, which is a number that's been climbing quietly in the background.
The fee gap that started all this
High fees are a stated driver. A June probe by DAXA and registered operators found flagged exchanges charged average fees of 1.5% to 10% — up to 62 times the 0.16% average on Korea's five largest won-based exchanges. Korean investors paid foreign exchanges an estimated $3.5 billion in fees in 2025, according to Tiger Research.
The money trail is bigger than fees. Tiger Research and Chainalysis put the amount moved from Korean to overseas exchanges at about 700 trillion won from 2021 to 2026, a figure that includes a projection for this year and covers only traceable routes. Net stablecoin outflows from Korea's major exchanges ran for an 18th straight month in June. Crypto on Korean exchanges lost 33% of its market value in the first half of 2026 compared to the second half of 2025, leaving it at 58.9 trillion won. Tiger Research also found Korean-owned wallets deposited about $1.64 billion into Hyperliquid, Lighter, and Variational since January 2024.
Read together, those numbers suggest a steady bleed of capital and traders toward offshore venues. The blocks are an attempt to reverse it.
What happens to user assets
KuCoin pushed back. A spokesperson said the exchange respects regulations across jurisdictions, that compliance remains central to its business strategy, and that user assets remain safe and secure. MEXC, Phemex, BingX, and BitMart did not offer statements in the FIU's disclosure.
The FIU acknowledged the blocks may restrict withdrawals — a real problem for anyone with funds stranded on an affected platform. It plans to guide users through the Digital Asset eXchange Alliance (DAXA). The regulator's advice is blunter than the mechanism: users holding assets on unregistered platforms should withdraw them immediately.
The next thing to watch is outflow data. It should show whether traders on blocked platforms return to domestic exchanges or move on-chain — and if replacement domains start popping up, the FIU has already said it will come after those too.
