Cast and credits of Die Telefonnummer

Louise Martini
Lydia Dresen

Hans Jürgen Diedrich
Kriminalobermeister Wenger

Helmut Fischer
Kriminalbeamter Knöferl

Heini Göbel
Kriminalbeamter Bucher (as Heini Goebel)

Manfred Spies
Buchers Begleiter (as Manfred Spiess)

Enzi Fuchs
Kellnerin Resi

Kunibert Gensichen
Heinz Stettner

Rosl Mayr
Frau Schindler

Helga Marlo

Peter Dornseif
(as J. Peter Dornseif)

Willy Schultes
Alois Wensteiner

Reinhard Glemnitz
Narrator (voice) (uncredited)

Willy Harlander
Polizist Wagner (uncredited)