A.T. Robertson Commentary Acts 23:34

"And when he had read it, he asked of what province he was; and when he understood that he was of Cilicia," — Acts 23:34 (ASV)

When he had read it (αναγνους). Second aorist active participle of αναγινωσκω, to know again, to read.

Of what province he was (εκ ποιας επαρχειας εστιν). Tense of εστιν (is) retained in indirect question. Ποιας is strictly "of what kind of" province, whether senatorial or imperial. Cilicia, like Judea, was under the control of the propraetor of Syria (imperial province). Paul's arrest was in Jerusalem and so under the jurisdiction of Felix unless it was a matter of insurrection when he could appeal to the propraetor of Syria.