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CaseSingularPlural
Nominativeименительный · кто? что?администратор администраторы the subject: who or what acts
Accusativeвинительный · кого? что?администратора администраторов the direct object of the verb
Genitiveродительный · кого? чего?администратора администраторов possession, absence, "of"-phrases
Dativeдательный · кому? чему?администратору администраторам the receiver: to or for someone
Instrumentalтворительный · кем? чем?администратором администраторами the tool or companion: with, by
Prepositionalпредложный · о ком? о чём?администраторе администраторах location and topics: in, at, about

Администратор is animate, so its accusative copies the genitive: the form after "I see..." matches the form after "of".

Look up any other word in the Russian declension tool, see where администратор ranks in the most common Russian words, or start from Russian cases explained if the table above is new territory. More vocabulary lives in Russian words by topic and Russian phrases.

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