- Michael R. Wally released a collection of 3 million toll-free calls. This is a requester-pays bucket of WAV files compressed with 7zip and split into blocks of 10,000.
- Telephone World. Various records of telephone sounds and error messages.
- Evan Doorbell’s Phone Tapes
- This is a Recording
Reverse Lookup Services
- OpenCNAM. Provides both cached and on-demand CNAM dips for a low fee.
- Alcazar Networks. Provides LNP/LNR lookups for a low fee.
- Spy Dialer. Provides on-demand CNAM and voicemail audio.