- Six (USA) (Metal-USA)
- Six (AUS) (Heavy Metal-Australia)
- Six And Twenty (Progressive Metal-USA)
- Six Beer (Heavy Metal-Mexico)
- Six Brew Bantha (Grindcore-Canada) - Other name : SBB
- Six Day War (Thrash Metal-New-Zealand)
- Six Days Of Darkness (Deathcore-USA) - Other name : SDOD, 6DOD, 6 Days Of Darkness
- Six Days Of May (Metalcore-Italy) - Other name : 6DOM
- Six Dead Horses (Stoner Doom-USA)
- Six Degrees (Groove Metal-Italy)
- Point One (Hard Rock-USA) - Other name : ex-Six Degrees
- Six Degrees Of Separation (Heavy Metal-Czechia)
- Six Feet Deep (Hardcore-USA)
- 6ft.Down (Alternative Metal-Japan) - Other name : Six Feet Down
- Six Feet Of Foreplay (Death Metal-Sweden)
- Six Feet Over (Metal-France)
- Boneset (Gothic Metal-Finland) - Other name : ex-Six Feet Seven Horns
- Six Feet Under (USA) (Death Metal-USA) - Other name : SFU
- Six Feet Under (SWE) (Heavy Metal-Sweden)
- Six Flying Putanas (Thrash Death-Germany) - Other name : 6FP
- Six Foot Orchard (Melodic Death-USA) - Other name : SFO
- Six Foot Six (Melodic Heavy-Sweden)
- Six Ft Ditch (Hardcore-United-Kingdom) - Other name : 6 Feet Ditch
- Six Grammes Eight (Hardcore-France) - Other name : 6G8
- Six In Line (FRA) (Alternative Metal-France) - Other name : SIL
- Six In Line (SWE) (Thrash Metal-Sweden) - Other name : SIL
- Six Magics (Melodic Heavy-Chile)
- Six Million Dead (Black Death-USA) - Other name : SMD, 6MD, ex-What Dark Creates
- Six Minute Century (Progressive Power-USA) - Other name : SMC
- Six Months Of Sun (Stoner-Switzerland)
- Six Of Swords (Death Metal-Canada)
- Six Pack (Thrash Black-USA)
- Six Point Lead (Metalcore-Italy)
- Six Point Six (Heavy Metal-Germany)
- Six Reasons To Kill (Deathcore-Germany) - Other name : 6R2K
- Six Reasons To Run (Hardcore-USA)
- Six Side Die (Alternative Metal-Canada)
- Six Sins Till Sunday (Metal-United-Kingdom) - Other name : SSTS
- Six Six Saw (Death Metal-Chile)
- Six Steps Above The Earth (Doom Metal-Greece)
- Six String Slaughter (Death Metal-Denmark)
- Six (USA-2) (Deathcore-USA)
- 6 Weapons (Hardcore-Chile) - Other name : Six Weapons
- Six-8 (Fusion-France)
- SIX-R (Visual Kei-Japan)
- Six-Score (Grindcore-Austria)
- Sixes (Sludge Doom-USA)
- Sixfinger (Crossover-Germany)
- Sixfornine (Progressive Metal-Greece)
- Sixgun Renegades (Hard Rock-Finland) - Other name : SGR
- Sixgun Serenade (Metalcore-USA)
- Sixgun Symphony (Heavy Metal-USA)
- Sixoneosix (Melodic Death-Sweden)
- Sixpasthell (Power Metal-USA)
- Sixpin (Alternative Metal-USA)
- Sixpounder Teratoma (Porno Gore Grind-Russia) - Other name : Sixpounder
- Sixstitch (Industrial Metal-USA) - Other name : Butcher Jones
- 16 (Sludge Metal-USA) - Other name : Sixteen
- XVI Eyes (Sludge Metal-Canada) - Other name : Sixteen Eyes
- 6th Dimension (Thrash Metal-Czechia) - Other name : Sixth Dimension
- Sixth Disease (Death Metal-Netherlands)
- Sixth Rage (Melodic Death-Russia)
- Sixty Nine (Crossover-Belgium)
- Sixty Watt Shaman (Stoner-USA)
- Sixty-Nine Vette (Hard Rock-France)
- Sixx:AM (Hard Rock-USA)
