- 450
- 451 (US rapper)
- 454 (stoner band from Uppsala, Sweden)
- 454 (Orlando rapper)
- 454 & Surf Gang
- 454 Big Block (Boston metalcore band)
- 45ACIDBABIES
- 45RPM (Korean hip hop group)
- 46bliss
- 47, Dino MC
- 47SOUL (Palestinian Jordanian electronic music group)
- 47SOUL & Lowkey
- 47ter (French rap)
- 47ter feat. Fouine, La
- 47ter feat. Gueko, Seth
- 47ter feat. KIK
- 47ter feat. Robin
- 47ter feat. Tayc
- 47ter feat. Todiefor & Janee
- 48 Cameras (Belgian-based international music collective)
- 485C
- 48May (New Zealand pop rock)
- 48th St. Collective
- 49 Burning Condors (Philly-based Gothic Witch Rock)
- 49 Days
- 49 Winchester (Appalachian soul music)
- 49ers (Italian house and Eurodance)
- 49ers, The (Delaware hip-hop duo)
- 49th & Main
- 49th Parallel (1960s Canadian pop band)
- 4am Kru (Jungle crew)
- 4AMTapes
- 4Arm
- 4B (EDM DJ & producer Robert McKeon Jr.)
- 4B & Chuwe
- 4B & Flosstradamus
- 4B & GESES
- 4B & Junkie Kid
- 4B & NvrLeft
- 4B & PuroWuan
- 4B feat. Garlin, Bunji
- 4B feat. Lee, Megan
- 4batz
- 4batz & Ye
- 4BOUT
- 4brvhvm
- 4cf
- 4Count
- 4D (Slovak hip-hop group)
- 4Dreamers (Polish group)
- 4ERDAK Pavlohrad, Dnipropetrovsk region, Ukraine
- 4EVE (Thai girl group)
- 4Ever (Polskie disco polo)
- 4EverfreeBrony
- 4EverfreeBrony feat. Chi‐Chi
- 4EverfreeBrony feat. Chi‐Chi
- 4EverfreeBrony ft. Milkmomo,Monty, Eile & MEMJ
- 4Eyez (UK Rapper)
- 4F Club
- 4F, LOS (Supergroup composed of Easykid, Young Cister, Kidd Voodoo and DrefQuila)
- 4FATE
- 4FIRE (Sub-unit of WSG Wannabe)
- 4FT Fingers
- 4ft Soldiers
- 4Fun (Lithuania)
- 4G (Norwegian Jazz Guitar Quartet)
- 4GOT10 (band underground torinese)
- 4gRe
- 4hands
- 4hero (Marc Mac (aka Marc Clair) & Dego (aka Dennis McFarlane))
- 4hero feat. Andersson, Carina
- 4hero feat. Scott, Jill
- 4hero feat. Uzuri, Imani
- 4Him
- 4Him feat. Anderson, Jon
- 4K (DnB)
- 4Keus (French rap)
- 4keus Gang (French Rap)
- 4L
- 4L Javi
- 4lienetic
- 4lung feat. minxmax
- 4LYN
- 4ma (an hunarian rapper)
- 4Mag Nitrous (Southern Rock, Stoner Metal, US)
- 4MEN
- 4minute
- 4minute feat. BEAST
- 4MIX (Thai boy group)
- 4na
