- C3 Radio Orange 94.0
- Cafe Bizarre Radiofabrik
- Cafe Cinema Freies Radio Freistadt
- Café de Flore FREIRAD
- Café Depresso Radio FRO 105,0
- Cafe im Weltladen Freies Radio Freistadt
- Cafe Kyiv Ukraine Radio FRO 105,0
- Cafe Mulatschag Freies Radio Freistadt
- Café Queer onAir CR 94.4 – Campus & City Radio St. Pölten
- Café Willnauer Radio Helsinki
- Caja de Guiños Orange 94.0
- Caja de guiños: Ficción radiofónica Orange 94.0
- Camp Radio Freies Radio B138
- Campus & City Radio St. Pölten CR 94.4 – Campus & City Radio St. Pölten
- CampusRadio Radiofabrik
- CampusRadio am ASF04 Radio FRO 105,0
- CampusRadio UNI Linz Radio FRO 105,0
- Campustalk CR 94.4 – Campus & City Radio St. Pölten
- Can Radyo FREIRAD
- Canadian Art canadien FREIRAD
- Care on Air Freies Radio Freistadt
- Cari-Talk Radio Freequenns, das Freie Radio im Ennstal
- Caritas & du (Sendereihe der Caritas Steiermark, Regionalkoordination Bezirk Liezen) Radio Freequenns, das Freie Radio im Ennstal
- Caritas in OÖ On Air in Kirchdorf/Krems Freies Radio B138
- Carla Kolumna CR 94.4 – Campus & City Radio St. Pölten
- Carmena Caminando Radiofabrik
- Caros kleines Musikuniversum Radio Freequenns, das Freie Radio im Ennstal
- Caweeska (Somali Prime Time Radio Program) Radiofabrik
- Cazzate Varie FREIRAD
- CCM – Christoph´s Cool Music radio AGORA 105 I 5
- Cellar Door Freies Radio B138
- Cellardoor Radioshow Radio FRO 105,0
- Chai mit Jan radioYpsilon
- Chaos della Musika Radio Freequenns, das Freie Radio im Ennstal
- Chart-Show – DIE TOP 15 Radio FRO 105,0
- CHASSER LE STRESS AVEC DE LA MUSIC FREIRAD
- Chatterbox Freies Radio Salzkammergut
- CHECK EUROPE – Europa auf dem Prüfstand Radiofabrik
- CHECK EUROPE FOR TEENS – Europa wie es euch interessiert Radiofabrik
- Check your Choice – Der Countdown zum EU-Wahljahr Radiofabrik
- Check your Choice for Teens – Dein Info-Countdown zu den EU-Wahlen 2014 Radiofabrik
- Chevapcici liest Wikipedia Radio FRO 105,0
- Chili Con Carne – Was die Seele zum Kochen bringt Freies Radio B138
- Chilibox Orange 94.0
- Chilli goes FREIRAD FREIRAD
- China am Puls Orange 94.0
- Christian in the Mix Radio Helsinki
- Christophs Jazz Evening CR 94.4 – Campus & City Radio St. Pölten
- Church Of Noise radioYpsilon
- Cinelounge CR 94.4 – Campus & City Radio St. Pölten
- Cinema radio AGORA 105 I 5
- CINEROTIC radio AGORA 105 I 5
- CIT – Computer, Internet und verwandte Themen – Das IT Magazin Radiofabrik
- City Talk CR 94.4 – Campus & City Radio St. Pölten
- CitySounds CR 94.4 – Campus & City Radio St. Pölten
- Civilmedia Radiofabrik
- Claim the Waves – Feministische Radiotage Orange 94.0
- Clash Connect Radio Helsinki
- clashconnect Radio Helsinki
- ClassicaLi Radiofabrik
- close to the sound radioYpsilon
- Club Ibiza Radio FRO 105,0
- Club Resonanzen Orange 94.0
- Co-Corporeality Orange 94.0
- Cocktail mit Kirsche Orange 94.0
- COCOYOC Radio Helsinki
- Collage – 100. Internationaler Frauentag Radio Helsinki
- Colorful India FREIRAD
- COME ON CR 94.4 – Campus & City Radio St. Pölten
- Come ON – Mädchenradioprojekt bei CR944 CR 94.4 – Campus & City Radio St. Pölten
- Comedy im Pub Radiofabrik
- comeonfeet! FASTFORWARDANDREWIND Radio FRO 105,0
- comix Orange 94.0
- COMMIT Hörspielseminar Freies Radio B138
- COMMIT Seminar Features 2012 Freies Radio B138
- COMMIT Veranstaltungen Gemeinschaftsprogramme
- Common Ground Orange 94.0
- COMPLEXITY Fluchtursachen und Hintergründe Radiofabrik
- Concrete Thoughts Proton – das freie Radio
- CONFIRM.HUMANITY Freies Radio Salzkammergut
- connect radio AGORA 105 I 5
- Connecting (ex)You Orange 94.0
- Connecting Communities Freies Radio B138
- Connecting Communities 2022 Freies Radio B138
- Connecting Communities Transferworkshops Freies Radio B138
- connecting systems – Clips Freies Radio Freistadt
- connecting systems – Interviews Freies Radio Freistadt
- connecting systems – Magazin Freies Radio Freistadt
- connex extern Orange 94.0
- connex : context Orange 94.0
- Consumo Ergo Sum Orange 94.0
- Context XXI Orange 94.0
- Contrast Freies Radio Salzkammergut
- Cool Britannia FREIRAD
- Corner Radio Radiofabrik
- Corona Information Vienna – Arabic Edition [كورونا معلومات فيينا] Orange 94.0
- Corona Information Vienna – English Edition Orange 94.0
- Corona Information Vienna – Farsi Edition Orange 94.0
- Corona Information Vienna – German Edition Orange 94.0
- Corona Information Vienna – Multilingual Radio Show Orange 94.0