I would appreciate this feature as well.

My company is finishing up a Salesforce-Zendesk integration, and I wanted to send our Salesforce admin our list of organizations and associated domains but this functionality does not seem to currently exist in a user-friendly utility. This is a shame, since the fields are available!

A workaround option is to use the Reporting functionality if your company has it (I'm not sure if only certain levels of Zendesk customer has this). See screenshot below that shows how to access this (Reporting icon, Insights tab, GoodData link).

I was then able to create a report of # tickets for an Organization and the Ticket Requester Domain. There are domains not being captured by this report if a user from a domain has not filed a ticket however, so still need to manually go through and verify, but this at least got me started. Same with organization, this will only show the list of organizations if a ticket has been created for them.