This website appears to have a company number registered at Companies House in the UK.
https://www.gov.uk/government/organisations/companies-house
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Get access to data on 467,121 websites that are Companies House Customers. We know of 467,105 live websites using Companies House and an additional 16 sites that used Companies House historically and 14,414 websites in the United States.
Get a list of 467,121 websites using Companies House which includes location information, hosting data, contact details, 467,105 currently live websites and an additional 557,804 domains that redirect to sites in this list. 16 sites that used this technology previouslyand 14,414 websites in the United States currently using Companies House.
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These are sites that we think might use Companies House in the future because of their similarity to other sites that already do.