Umzino @ColdMastermind #142652762

2,470

followers (as measured)

11 July 2016

account created (per Roblox API)

13 Aug 2026, 23:57

last measured (UTC)

Username record

@ColdMastermind — observed 13 August 2026

Roblox’s API lists prior usernames without dates; the dates above are when this register observed each name, which bounds — but is not — the change date.

Groups owned (as measured)

McDonald's [Hall Organization]#2861844

• Cam's Apparel •#14593940

TT Talk Show#5751170

Sir and Ma'am gang#10580841

[NBC] Pain Designs#3136614

Ro-Tweet! KingBellium's blog.#322939

Shine Bright Like A Diamond Squad#4258928

Roblox Elemental Productions#3193734

LoudBassBoostYT#5446399

Pink Team!!!#8009390

Sweet soft peach#9459713

T.RA.S.H P.AN.D.A.S#7194448

Mimi’s dark wrld#7788507

Mad City Hangout#8586541

the wired friend group#6337672

meme...s#7071750

The Militsiya#5346384

ᴍᴍ2 ᴛʀᴀᴅɪɴɢ ɢʀᴏᴜᴘ#9314181

Republic of Perth#2619980

Xplore Roblox Ltd#9015476

Pineapple gamerz squad#6218299

9

Well this is it#3731041

9

Sunrise Interactive & Games#15187794

9

lmy lalas!#7527547

8

little rat men#6394016

8

!$Vr1bl0od#15132496

7

FLIPOUT Trampolining#13133063

7

Autobahnamt Deggendorf#14823006

5

United States Marine Corps."#7415523

5

slaughter people#6147725

5

김치부대#13864568

5

t xi l ly#8385404

5

Robux_da_Gabi#10018276

5

Rayna Asmr Fan group!#15481318

4

Roblox Klubb Swedish#5544524

4

The Hotdog Guys!#6372238

4

4

TʜE ꜱeekers#6758987

3

ام باكك قروب الحلوين ~_~#9234391

3

Justsomerandomasgroupx2#14217850

3

Grupo pra ganhar Robux.#7828658

3

Light National Studios#8659366

2

The cutest clothing#10283416

2

SR | Solanas Resort Dev Group#10358160

2

Weird people who don’t have any thing better to do#10371912

2

MVP_vibes#10023370

1

TTK.Kajuan#9666537

1

The E group that go E#8487465

1

The Sly Wolves#9077326

1

Snuggle babies#9638415

Open data

Download this user’s observed record: username history (CSV) · record (JSON)

Also a member of

The Flamingo Fan Club#3336691 · December 5th we will all do something

Car Crushers Community#2726951 · Skilled Crusher

ROLVe#2613928 · Members

QuadraTech#4645213 · Supporter

|GAR| Grand Army of the Republic |#5214183 · Cadet

The US Military 1940s#4545116 · Private

Edot#5103306 · Member

SCP | Roleplay Community#5479038 · Roleplayer

[CBRN]#5855434 · [E-1] Recruit

TeamTanqR#3052825 · Fans

generic roleplay gaem fanclub.#5574524 · fan.

Deardin Studios#34290951 · 🐉 | Dragon Rider

The First Encounter Assault Recon#72321 · [REC] Recruit

Nocturne Entertainment#1211044 · Supporter

OG Roblox's Myths For Real For Life#1106775 · fnaf missing children

The Galactic Empire ‌ ‌ ‌ ‌#3145747 · Staff Sergeant

Moonlight Interactive.#4789539 · Member

DeeterPlays#4659323 · Member

Maxxell#4740060 · Maxxell

Lucky Leek Productions#8982189 · Player

Bandites#2630091 · Fans

xThree#3534090 · Stars🌠

RECOIL Group#5031043 · Member

TheFishTank#5083033 · Fish

State οf Mayflowеr#33462869 · State Resident

NEVERDIE INTERACTIVE#5176390 · Members

rbx.classics#33035620 · Beaver

Daylight UGC#32381758 · Awaiting Roles

BOMBLINE#15251983 · Member

Genesis Outfitters#5112875 · Genesis Acolytes

Kit Battlers!#4945347 · Kit Battler

Smooths Medieval Fortress#35461151 · Owner

Trixt0r#34799704 · you

Vong Remnant#10405581 · Vermin

Ninja Destiny Studios#35750557 · Member

Anti You#10495857 · Customer☺

OG| Roblox Group#8491664 · Member

royals basement#8538318 · held hostage

phrase shirts#15208883 · Member

The ratcat gang#17168381 · Knights of rat cat gang

Soldado Enterprises#35945744 · Intern

ZLINK CLOTHING#14936753 · Member

9

Great Clone Army (GCA)#9798660 · E1 - Cadet

5

we love rats bc yeah#10023378 · Owner

1

Random FNF profile theme's!#16004804 · Swag person

1

Kitty’s Fashion’s#10210169 · Owner

1

poopity mcpooperson#9601511 · Owner

1

안녕하세요리사#9827366 · Owner

1

SC Clothing!#9379208 · Owner

1

Marine Forces Special Operations Command ⊡#9831063 · Owner

Membership and rank as measured from this user’s public group list.