Mas @Mastered21 #78667935

15 February 2015

account created (per Roblox API)

30 Oct 2026, 14:57

last measured (UTC)

Username record

@Mastered21 — observed 30 October 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)

Dev Thing Project#17089626

3

Red's group for alts#5267901

2

| ＶＡＮＩＴＹ |#5350929

Open data

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

Also a member of

Blue Lock Rivals Unofficial Fans#34671275 · Member

Current.#34852864 · Member

Sol's Studio#8509669 · [Gamers]

AoTR [PI]#17347863 · Member

(学乱) Gakuran#416091513 · Students

Roblox High School: Fan Club#1127093 · Dedicated Fan I

RELL World#1226491 · [Gen] 2X2X

[B:S] Azure Latch Team#35316274 · Member

Kitawari#17219742 · Member

Small World Games x Anime Defenders#34121350 · Member

[B:S] ALS Team#12229756 · Member

RELL GAMES#4939446 · Bronze Rell

Awesome Ninja Games#15557357 · Member

Cool group for big cool people#9285211 · Pro

Universe Time Studio#6556072 · Universe Member

[B:S] Anime Fighters#9213039 · Fan

uma racing Community#376874468 · Member

Jump Corp#34223768 · Player

32x#35139043 · Members

PlayCombatWarriors#5192826 · Combat Warrior

TS Industries.#14215552 · Member

Bizarre Collective#33161040 · Member

Devil Hunter May Cry#35791681 · Member

Blox Studiо#4843020 · Member

Midnight Continent#9233039 · Member

Universal Tower Defense [UTD]#33861560 · Member

Komplex Studio#9190691 · Tester

Gamer Robot#2938223 · Member

Fireheart Studio#4294803 · Community

Lunmei#35958846 · Supporters

Rachael's Cabin#7944567 · Member

MOMENTXM#17351304 · [Player]

BlackstarDW Studios#36025827 · Member

[Peroxide]#14335928 · Wave 2

The Attack on Titan Project#3865381 · Low Class

Archived Library#32725402 · Member

Snail's Shell#34834461 · Member

Hidden RELL Village#7418091 · Villager

Reason 2 Die Community#1104933 · Members

SwenzjeGames#5217465 · Member

NAMEK GANG#6664536 · Wave

oPassionX#16992334 · Member

VoxlGames#13117183 · Fan

Extraordinary Adventures#6085591 · Member

Opulence Studios#6761107 · [S] Supporter

SGO Team#3245123 · Unverified

CLOUDSU#10746721 · Member

joe's group lol#12832629 · Member

Amorian Skies#16761292 · Abomination [Py]

Budokai-Z Community#15285043 · Member

bored fan club#12261660 · Member

Splitline: Vision#16775930 · New Generation

Shonen: Online 2#14681002 · Member

Humanity's Fate#13281782 · Player

[CC] Shonen Online 2#32305431 · CC Tester

RenSoft#14446800 · Member

Kishin [Official Group]#35862001 · Wave 0

SpirituaI Studio#10569041 · Muse

The Northern Frontier / HBC#3763434 · Community Member

PNEUMA:DEV#15216379 · Player

The 206#4701945 · Member

we make dreams#15440184 · Wave 1.5

Trillionaire Games#7816088 · Member

K&S Studios#9312245 · Member

Cataclys Games#6668276 · Community

WeMakeOkGames#5500746 · Tester

Kingdom of the Queen 9991#8051645 · Member

Curry Clan#4507061 · Member

Attack on Titan: Exodus#10688692 · Awaiting Regulation

i am dead inside#2928307 · Waved

ONE PIECE LAST DREAMS#32348903 · wave 0

talli#5368017 · Member

Kurai [CC]#16766694 · Member

Dynasty Development.#10316539 · [C] Community

Attack on Titan: Untold#15149751 · Low Class

[\_Team Epik_/]#930979 · Member

Northern Frontier Private Militia#3841665 · 5zAwSrb

【 Conversions 】#828577 · Conversions Fan

\\Voxal Nation//#958921 · Member

[US] Trainee Corps#15152196 · Phase I

Designer Apparel®#3505576 · Designer® Customer

Myrnatuin#7892213 · Member

Delorse Halcomb#7995043 · Member

Eliadestion#7891874 · Member

Cactus Squad (Join My Squad For Fun!)#7137216 · Member

Cookie Divas Cheer Squad Owned by cutiepie6487 :D#858226 · Member

Fluffy's Gamers#1169852 · Member

Cloudy Members#6262597 · ✰ Cloudy Member ✰

Fat group Fan group#7855298 · Member

Kai's group thing#4066978 · Friends

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