https://phab.wiki is/was a domain that acted as a redirect to https://phabricator.wikimedia.org e.g. https://phab.wiki/1 would redirect you to https://phabricator.wikimedia.org/T1.
I noticed today that said domain no longer redirects here but instead displays a "404, this domain is not configured". Was it ever owned by us? I can't see any WHOIS data (everything is redacted).
That domain was used on several emails and mailing lists archives, and I guess this means that those links are now broken.
I am not sure of what happened: misconfiguration, domain expiration (either intentional or not), but given that it was something that worked until recently and now suddenly it does not, without any advance notice I am aware of, I thought I shall file a Task.
Thanks for your time.