Thousands of U.K. businesses and groups may lose their .eu domain names May 30 if there’s a no-deal Brexit.

The .eu country code domain operator, EURid, said Jan. 24 that if the U.K. leaves the European Union March 29 without a deal, it will give U.K. registrants two months to update their contact data and show they are legally established entities in the European Economic Area. EURid will remove the domain names of registrants who fail to demonstrate their eligibility, it said in its updated guidance.

About 187,000 .eu domain names are assigned to U.K. organizations and companies, and 45,600 are assigned to U.K. individuals, EURid spokesman Giovanni Seppia told Bloomberg Law.

Seppia said that EURid released the updated guidance after reaching an agreement with the European Commission on next steps for .eu domains.

Any domain names that are set to expire between March 30 and May 30 won’t be automatically renewed and will be removed from the domain name system, EURid said.

If the UK instead leaves the EU following a planned transition period on Dec. 31, 2020, U.K. registrants will have until March 2, 2021 to update their contact data and prove their eligibility, according to the notice.