Ranked:

#12 in Telefonauskunft, #15 in Telefonbuch, #15 in Telefonbücher, #15 in Telefonnummern, #45 in Adressen, #69 in Telefon, #83 in Auskunft, #130 in Auskünfte, #146 in Telekommunikation, #203 in Phone Books