GoDaddy is a domain name registrar and web hosting company that also provides website building, email, and online marketing tools.

Namecheap is a domain name registrar and web hosting provider known for low-cost domain registration and free WHOIS privacy protection.

Network Solutions is a domain name registrar and web services company that was the original operator of the .com, .net, and .org registries in the 1990s.

Verisign operates the authoritative registry for the .com and .net top-level domains, running the backend infrastructure that resolves those domain names.

IONOS is a German web hosting and domain registration company, part of United Internet, offering domain names, websites, and cloud hosting.

Hover is a domain name registrar, owned by Tucows, focused on straightforward domain registration and management for individuals and small businesses.

Flippa is an online marketplace for buying and selling websites, domain names, and other online businesses.

Sedo is a domain name marketplace that lets users buy, sell, and park domain names, and also offers domain appraisal services.

Afternic is a domain name aftermarket platform, owned by GoDaddy, that lists domains for sale and distributes those listings across a network of partner registrars.

Dan.com is a domain name marketplace, owned by GoDaddy, that lets sellers list domains for sale and handles secure payment and transfer for buyers.