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@kostek57200 #524769397

19 February 2018
account created (per Roblox API)
10 Oct 2026, 23:34
last measured (UTC)

Username record

@kostek57200 — observed 10 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)

Roblox modera#4483850
7

Open data

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

Also a member of

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LSPLASH#3049798 · you guys
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Sonar Studios#2919215 · 🕹️Sonarian
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Chillz Studios#2782840 · 🌟Royal Member🌟
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BIG Games™#2703304 · Fan
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(学乱) Gakuran#416091513 · Students
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16bitplay Games#3233280 · Member
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Double Bandit Studios#13751258 · Bandits
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Easy.gg#5774246 · Member
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The MonkeyMan Fan Club#14765325 · Member
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Play! Studios#7165738 · Supporter 😇
4,305,895
Thinking Project#1235888 · noob
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Windburst Banana#13657923 · Members
3,527,012
IROC Studios Building Roleplaying Community#7064117 · Verified Gamer 🕹
3,495,355
Awesome Ninja Games#15557357 · Member
3,244,800
InfinityInteractive#11257245 · Fans
3,218,471
BIG Games Super Fun#10026748 · Fan
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Dungeon Quest by Voldex#4788489 · Member
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Playduo Studio#4626344 · ⭐Fan
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BIG Games Experimental#4981455 · Fan
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Kohaú#4731484 · Customer
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TBlox Studios#6039961 · Player
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Stouts Studio#15794692 · Member
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Goofy Vegetables#35333553 · Member
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Kavra's Kingdom#4561896 · Receptionist
1,731,267
Drive World | Twin Atlas#4909558 · Racer
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Virtual Block Studio#2856593 · Member
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United States Army    #3108077 · [E7] Sergeant First Class
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Talent Show Group#2794002 · ⭐ Fan/Auditioner
1,401,542
| Coffee Bros |#32308848 · Fans
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Polaroid Studios#15422038 · Pre-Alpha Players
1,264,664
SEA Military#2648601 · [T] Trainee
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[Dinosaur World]#4409241 · Supporter
1,155,240
[CUSA] United States MiIitary#4219097 · [E2] Private
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[CBRN]#5855434 · [E-1] Recruit
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Funwise#11338347 · Member
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Dunn Games#4035125 · Fan
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Stateview Correctional Facility. ∞#5025380 · Deputy Warden
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GoPro Expedition Team#2961381 · Novice Climbers
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Blox Studiо#4843020 · Member
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CTStudio#9482918 · Supporters
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10K Steps#596089868 · Member
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TJim's Studio#33768122 · Member
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generic roleplay gaem fanclub.#5574524 · fan.
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Five-O Community#4824823 · Member
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Fabled Legacy#16467338 · Member
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Stepford County Railway#3620943 · [QD] Qualified Driver
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[TCU] The Computer Union#8513762 · Civilian
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Central Intelligence Agencyᅠᅠᅠ#6572612 · Special Operative
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Promidius Games#7532271 · Member
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StackOrStarve Studios#8667673 · Community
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Sebee#6303746 · 😎 PRO
527,732
The Glorious Robot Army#11872496 · [1] Troop
401,381
UnᎥted States Marine Corps#5570997 · [RT] Recruit Training
384,962
Hοly Rοman Empire#5908211 · Recruit
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New York City Pоlice Departmentᅠ#9473652 · Police Cadet
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대한민국 육군 [Korea Army]#5021988 · ROKA︱훈련병
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Ḉontinental Army#5031513 · Militia
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Super Fun Tycoons#14890739 · Member
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Prison Life Community#1132638 · Fans
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United Clan of ROBLOX#18 · Patriot
237,312
Plasma Inc.#4192306 · Member
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Empire Clash Community#13025287 · Community Member
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{RA} Robloxian Adventures#4963098 · Certified Guide
158,051
-= AEGIS International =-#2744682 · 〔SO〕 Senior Operative
143,270
Reason 2 Die Community#1104933 · Members
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Runker#4575704 · Member
141,583
SamirDevs Studios#5011682 · Member
133,600
Moonwood Studios#4525406 · Fan
133,403
bordr fanclub#5069767 · unpaid npc
100,606
GameLoaded Entertainment#2521353 · Member
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Cookie development#3058378 · Chocolate chips
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muffahi's trains#4289781 · Member
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Out of Blox#10177678 · Member
59,695
Canadian Armed Forces  #3877279 · Lance Corporal
53,394
Day of Dusk#4621832 · Citizen
47,565
Flames of War Community#4952707 · Member
47,293
Simple Resort Club#4887981 · Trained
44,367
LumberCraft#4066869 · Member
42,516
Ready 2 Die: Community#5407300 · Survivor
42,009
[RA] Search & Rescue#5315995 · Recruit
38,508
Plasma Security Division#5114770 · Trainee
37,735
Żabki Mereza#9208234 · Fan Mereza
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[RA] Robloxian Adventures Training Academy#4542650 · RATA Certified
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Quartermaster Customs#5040124 · Client
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RO-BOXING Official Fan Group#4048687 · Member
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Policja [RP]#11677190 · 《 S2 》 POSTERUNKOWY
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Galactic Dwarf Studios#6351442 · [S] Supporters
9,694
Enterprise Studios'#5098927 · Cool Person
8,198
United Stаtеs Navyᅠ#6026348 · 〘E1〙Seamen Recruit
6,646
iiTwirlinq's F3X#10273166 · *1* Beginner Builder
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O' Donnell Clan#8993831 · Citizen | Saoránach
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Bristol Line#5129452 · Group Guest
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krock's camp#11433223 · Special Camper
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Membership and rank as measured from this user’s public group list.