What the table shows
For every domain the page runs the same live lookup as the full domain report and keeps the columns that matter when you look after many names at once: the registrar, the registration expiry date with the days that are left, the domain the nameservers belong to, whether MX records exist, whether SPF is published and which DMARC policy applies, and the expiry date of the TLS certificate on the website. Each row links to the full report.
The lookups run from your browser against the OrbitProbe lookup API, three at a time, so a list of 25 takes a minute or so. Nothing is stored: the table lives in the page, and the CSV file is built in your browser.
Unknown means unknown
Some registries publish no expiry date or no registration data at all, some name servers time out, some sites have no HTTPS. Where a value could not be read, the cell says "could not be checked". It never shows a guess, and a failed lookup never means that a domain is free to register.
Lookups are rate-limited per visitor. If the limit is reached in the middle of a list, the remaining rows are marked "could not be checked, try again later" and you can run them again after a short wait.
When a bulk check is the right tool
Use it for a quick audit: which of our domains expire in the next 60 days, which ones still have no DMARC record, which certificates are close to expiry, which names sit at a different registrar or DNS host than the rest. For names you want to keep an eye on continuously, add them to a portfolio in the workspace instead, where reminders run on a schedule.