MrKostya8313Cosplay @Kostya8313 #1697991375

15 June 2020

account created (per Roblox API)

31 Oct 2026, 21:35

last measured (UTC)

Username record

@Kostya8313 — observed 31 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)

The Blue hat Studios#917814270

6

Third Free RP Groop (Third Confederate RP Groop)#840642458

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Foxzie#3955051 · 👤 Member

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Pilot Training Club#2794513 · Trainee Pilots

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USSF - United States Special Forces#22025 · [5] Sergeant

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Edot#5103306 · Member

Abracadabra#997074 · Players

Schwifty Studios#3642592 · Fans

| Coffee Bros |#32308848 · Fans

Retro Dev#5264310 · Member

MAD STUDIO#858127 · Followers

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A.A Fun#8275393 · 🎇A.A Fun🎇

[TCU] The Computer Union#8513762 · Civilian

Guts & Blackpowder#16911831 · Fans

Moondrop Studios#4368670 · Member

PANTSIR DevTeam#12609204 · 〘💬〙Community Member

Frigus#1049814 · Fan

Harbor Havoc#5167874 · Player

The Glorious Robot Army#11872496 · [1] Troop

Starboard Studios#3755133 · Follower

HappyWolfy10's Games#7919662 · Member

Yvu Productions#4029998 · Supporter

Thermal Interactive#11517261 · Member

Above The Air!#35593849 · Cool People 😎

Great Scott#5516617 · Member

DEL Interactive#1032456636 · Member

Mega Obbies#4209816 · Fan

[λ] Half-Life Roleplay#2795144 · HLRP Member

FPE:S#34080336 · Student

Shedletsky Studios#2814397 · Subscriber

The Chornobyl Anomalous Area#3368918 · 2-Gear Member

Empire of the British Isles#6773197 · Private

goose in red#15946459 · ♟cool person

Криминальная Россия RP#11490310 · Member

Bitrix Development#14747831 · Employee

First Chechen War 1994 Community#14999727 · Community Member

Undone Studios™#2841051 · [👥] Community [👥]

ZER0 TEAM#14283748 · 🔻Member

African Studio#35118473 · Member

Rainfall Studios ™#4328645 · Fan

J Cowboy Studios#10117472 · Fans

Random Mafia Shooter#35994832 · Member

hàz3mn#33236889 · Member

Latros#11212106 · Member

The Roblox Plasma Science Group#5205177 · Member

SpawnedHallucinatory#35818381 · ^_^

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Jule Games Holding#13606162 · Member

Melchett's Living History#3450995 · Community Member

The Lemitsia .#34996897 · Candidate for Lemitsia

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Destroy The Bridge Club#14823563 · Bridge destroyer

United Stаtеs Αrmуᅠᅠ#15902418 · Recruit

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Last Dawn Presents#35121218 · Member

Royal Rifle Brigade#6973979 · Rifle Recruit

Burgers and Fries Roleplay#2801751 · Member

Roblox HQ#30 · Fan

Ower's kitchen#33978264 · Eater

[TCU] Ministry of Foreign Relations#9774623 · Foreign Diplomat

MΔple Studio#35599820 · Katieverse fan!

Pot Brigade's Studio#9868786 · Players

MFPE#35898737 · Member

10 years later#34604170 · Explorer

The Lemitsian Studio#35607823 · Lemitman

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2013ers group#2814850 · 2013 fan

"Quality" Meme Shirts#5069452 · member

30000#34284865 · Member

[KoS] Kingdom of Seeden#558624066 · Civilian

[KoS] The Royal Seedish Army#830067942 · Draftee

Fan Russian Henry Stickmin 3D RP Community.#35320918 · High-Ranked Toppat

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