In the FNAF universe, phone calls from characters like "Phone Guy" (Ralph) are central to the gameplay and lore, providing instructions and unsettling background details across the first three games. While there is no official standalone "Telefonbuch" app, several related mobile experiences and community resources exist:
: Specific collection on Internet Archive featuring IPA downloads for the original four games. In-Game Phone Reference (Into the Pit) download-five-nights-freddys-telefonbuch-ipa
: A massive library containing over 16,000 IPAs, including various versions of the FNAF series. In the FNAF universe, phone calls from characters