- 3T feat. Prince Markie Dee
- 3TEETH
- 3TEETH & Gordon, Mick
- 3TEETH feat. Gordon, Mick
- 3than
- 3union
- 3viertelelf
- 3X (IDOLY PRIDE)
- 3x Krazy
- 3x1
- 3x3cute (music producer)
- 3xBlast
- 3xbravo
- 3xperimental
- 3YE
- 3Yo
- 4 Apostel, Die
- 4 by Four
- 4 Cats
- 4 Circles (Nikita Vasilyev)
- 4 Clubbers
- 4 Door Theater (Alt/ Pop - USA Members: Garrett Joseph Cyr, Bipul Lama & Mark A. Demao Established in 2014)
- 4 Elements
- 4 For Fall
- 4 Front
- 4 Grandes del Norte, Los
- 4 in Love
- 4 Non Blondes
- 4 of Us, The (Northern Irish band)
- 4 Out of 5 Doctors
- 4 P.M. (R&B quartet from Baltimore)
- 4 Promille
- 4 PS
- 4 Strings (Netherlands dance duo)
- 4 Strings & Burton, Cathy
- 4 Strings & Day, Fenna
- 4 Strings & Fridolijn
- 4 Strings & Gallagher, Audrey
- 4 Strings & Heath, Katty
- 4 Strings & Lee, Carol
- 4 Strings & Rivera, Denise
- 4 Strings & Sue McLaren
- 4 Strings feat. Cousins, Tina
- 4 Strings feat. Criado, Ana
- 4 Strings feat. Lawson, Ellie
- 4 Strings feat. Lumiere, Eric
- 4 Strings feat. Sphere
- 4 the Cause
- 4 to the Bar (German lounge/latin/jazz quartet)
- 4 to the Bar (garage house ("Slam Me Baby" feat. Alexis P. Suter))
- 4 Trinity (Christian music rap group)
- 4 Tune Fairytales
- 4 Villains
- 4 Wings
- 4 Zimmer Küche Bad
- 4-2-4 (football anthems)
- 4-4-2
- 4-Kuma
- 4‐Skins, The
- 4.0 (RnB/swing/soul group)
- 4*
- 4*TOWN (fictional band)
- 4*Town, Fisher, Jordan, Finneas, Levi, Josh, Ngo, Topher & Villanueva, Grayson
- 4+1 Ensemble
- 40 Below Summer
- 40 Cal.
- 40 Fingers
- 40 Ft. Ringo
- 40 Glocc
- 40 Grit
- 40 Thieves feat. Qzen
- 40 Watt Sun
- 40 Winks (Belgian instrumental hip-hop duo)
- 40% (Omri Harpaz; Psy-Trance)
- 40000 Gang (french rap)
- 403 (Japanese melodic power/speed metal/rock band)
- 404 COLLECTIVE
- 404 Sensei
- 404.zero
- 404Billy (french rapper)
- 404hugo
- 404vincent
- 408 (pop punk band)
- 408 Darwin
- 408 feat. Acorn, Taylor
- 408 feat. Titus
- 40ft to go
- 40mP
- 41 (US hip hop group)
- 41 & Kyle Richh
