Label » O
- Obscène Et Anémique
- Ocean Floor
- Ochre
- Ochre Records
- Odd Size
- Off-Kilter
- Ognidove
- Oh My World
- Olaf Ladousse
- Old Bicycle Records
- Old Europa Cafe
- Old Europe Cafe
- Olde English Spelling Bee
- Ole Records
- Olof Bright
- Oloj Records
- OnderStroom Records
- Onibaba
- Ono Tesla
- Onomatopee
- ONPA)))))
- Opa Opa
- Opal Tapes
- Open Circuit
- Optical Sound
- Opuntia Books
- OR
- Oral
- Orbis Pictus Club
- Ordia Muszc
- Ordo Viatorum
- Orient Press
- Orphax
- Orre
- Orthlorng Musork
- Ostblock Records
- Otomatik Muziek
- Otoroku
- Out One Disc
- Outsider Records
- Overclockheadz
- Ozonokids
