No one seems to know. As a reader pointed out, start with Public Interest Registry, which is the authoritative source for .org whois lookups. If you search for "icann.org," you'll see the list of nameservers associated with the domain name, but for the contact information, you'll see this: "SEE SPONSORING REGISTRAR." The sponsoring registrar for "icann.org" is Register.com. A lookup of "icann.org" on Register.com's whois server provides: "Domain not found."