K-pop Boy Groups

9 and the Numbers Members Profile: Full Names, Ages, Heights, Weights and More

June 24, 2026 | By
9 and the Numbers members are Jaegyung, Jeongmok, BOY.D, and Coolbursut.
OriginSouth Korea
DebutDecember 29, 2009
Number of Members4
MembersJaegyung
Jeongmok
BOY.D
Coolbursut

9 and the Numbers Members Profile

Jaegyung

9 and the Numbers member Jaegyung
Full NameSong Jaegyung
BirthdayApril 19, 1981
BirthplaceSeoul, South Korea
Age45 years and 2 months old
HeightN/A
Zodiac SignAries
Chinese Zodiac SignRooster
EducationSeoul National University
PositionVocalist
Instagramflyingace09

Jeongmok

9 and the Numbers member Jeongmok
Full NameYoo Jeongmok
BirthdayFebruary 14, 1984
BirthplaceN/A
Age42 years and 4 months old
HeightN/A
Zodiac SignAquarius
Chinese Zodiac SignRat
PositionGuitarist
Instagramyoojungmok

BOY.D

9 and the Numbers member BOY.D
Full NameYoo Byeongdeok
BirthdayN/A
BirthplaceBusan, South Korea
AgeN/A
HeightN/A
Zodiac SignN/A
PositionDrummer
Instagramb____3____D

Coolbursut

9 and the Numbers member Coolbursut
Full NameLee Yong
BirthdayN/A
BirthplaceN/A
AgeN/A
HeightN/A
Zodiac SignN/A
PositionBassist
Instagramcoolbursut

FAQs

How many members are in 9 and the Numbers?

9 and the Numbers is a 4-member K-pop boy group. The group consists of Jaegyung, Jeongmok, BOY.D, and Coolbursut.

When did 9 and the Numbers debut?

9 and the Numbers debuted on December 29, 2009, with their album 9와 숫자들.

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