Every relevant idol group/band that has debuted since 2003. A total of 83, not including sub-units or solo artists. Probably going to update every now and then, feel free to use for personal stuffs. :3 if you want me add a group in, comment below. 

STATS: 46 Boy Groups 37 Girl Groups 2 Co-Ed

100%
15&
2AM
2NE1
2PM
4Minute
9Muses
After School
A-JAX
AKMU
AlphaBAT
AOA
APink
B.A.P
B1A4
Bangtan Boys
BEAST
BESTie
Big Bang
Block B
Boy’s Republic
Boyfriend
Brown Eyed Girls
BTOB
C-Clown
CN Blue
Co-Ed School (Speed/F-ve Dolls)
Crayon Pop
Dal Shabet
Davichi
DMTN
D-Unit
Epik High
EvoL
EXID
EXO-K
EXO-M
f(x)
F.Cuz
FIESTAR
FT Island
Girl’s Day
Girls’ Generation
Glam
GOT7
Hello Venus
Infinite
JJCC
JYJ
KARA
Kiss&Cry
Ladies’ Code
Led Apple
Lunafly
MBLAQ
Miss A
MR MR
MYNAME
NU’EST
Rainbow
Secret
Seventeen
SHINee
Sistar
SM the Ballad
Spica
SS501
Stellar
Sunny Hill
Super Junior (15)
T-ara
Tasty
Teen Top
The Grace (CSJH)
Tiny-G
Topp Dogg
TRAX
TVXQ
U-Kiss
VIXX
Wa$$up
Winner
Wonder Girls
ZE:A