As near as I can tell, these are the top 1,000,000 domains referred to by other websites they crawled.
The report is described as "The million domains we find with the most referring subnets"[1] and a referring subnet is a host with a webpage which points at the domain.
So to the grandparent, presumably if something is "linking" to these domains, they probably were meant to be websites.
The report is described as "The million domains we find with the most referring subnets"[1] and a referring subnet is a host with a webpage which points at the domain.
So to the grandparent, presumably if something is "linking" to these domains, they probably were meant to be websites.
[1] https://majestic.com/reports/majestic-million [2] https://majestic.com/help/glossary#RefSubnets, https://majestic.com/help/glossary#RefIPs and also https://majestic.com/help/glossary#Csubnet