whois app.roll20.net/users/16718398/okbau-u
Domain:
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Try for webbased whois (don't expect it to work yet)
app.roll20.net/users/16718398/okbau-u
checking....app.roll20.net/users/16718398/okbau-u
$
whois
app.roll20.net/users/16718398/okbau-u
No whois server is known for this kind of object.