South Korea is blocking the websites of 27 unregistered crypto exchanges, extending a crackdown that until now had only reached mobile apps. KuCoin and BitMart are among the blocked, and MEXC is on the list too.
The country's Financial Intelligence Unit announced the move Tuesday after the Korea Communications Standards Commission approved the restrictions in reviews on Oct. 6 and 7, CoinDesk reports. Sites operated from overseas will be blocked, while domestically hosted platforms face service termination.
What changed
The app stores were the first front. Cointelegraph reported back in April 2025 that South Korea had blocked downloads and updates for 14 unregistered exchange apps on Apple's App Store, following similar restrictions on 17 apps through Google Play. Tuesday's decision closes the other obvious door: the browser.
The bigger shift is procedural. Regulators can now seek website blocks as soon as they detect unregistered activity, without waiting for a court ruling or evidence that customers have lost money. That is a preemptive enforcement power, and it is worth sitting with for a second. The old model punished harm after it happened. The new one treats access itself as the violation.
The full list runs to 27 names. KuCoin and BitMart were named earlier, as was MEXC. Cointelegraph's reporting adds Phemex, Bitrue, CoinW and BTCC. It also names BingX and DigiFinex. To operate legally, an exchange has to register with the FIU and meet the country's security and anti-money-laundering requirements. The FIU says it judges whether an overseas operator is targeting Koreans by looking at Korean-language services, marketing aimed at South Korean users, and transactions in Korean won.
The withdrawal problem
Here is the part that should worry anyone with funds on these platforms. The FIU itself acknowledged the blocks could complicate withdrawals for existing users, and it urged investors to verify registration and pull their assets. It says it will provide withdrawal guidance through the Digital Asset eXchange Alliance (DAXA), with cooperation from the operators.
Read that again. The regulator is cutting off access to the sites while promising to help people get money out of the sites it just cut off. If cooperation from the operators were guaranteed, the guidance would not be necessary. Anyone holding coins on an unregistered exchange in Korea is now depending on the goodwill of a company their government has just called illegal.
KuCoin, for its part, gave CoinDesk a statement that says almost nothing: "We respect applicable laws and regulations across jurisdictions and continuously strengthen our compliance framework in response to evolving regulatory requirements." No timeline. No commitment to register. No word on Korean users' funds.
The FIU set no deadline for registration and said nothing about how long the blocks will last.
My read
This is what enforcement looks like when a government decides its crypto rules are real. Korea has a registration regime, and the regime now has teeth. The likely effect is a shuffle of Korean trading volume toward whichever platforms bother to register, and a quiet exit for the rest.
Whether the blocks actually hold is another question. Website blocking is a blunt tool, and determined traders tend to find workarounds. But the signal matters more than the plumbing. The cost of serving Korean customers without registering just went up, and I would bet it keeps going up.
Sources
- CoinDesk: South Korea blocks 27 crypto exchanges, including Bitmart and Kucoin
- Cointelegraph: South Korea moves to block 27 crypto websites, including KuCoin, MEXC