Experimental Vault 87 #5167544

members (measured 25 Aug 2026, 12:48 UTC)

14 September 2019

created (per Roblox API)

10 August 2026

first measured by this register

Membership history

Growth

Growth history is still building. We hold one measurement for this entry. A trend needs at least two, taken days apart — so this will fill in on its own rather than being estimated. We do not publish numbers we have not measured.

Measurement log — every members count we have recorded
Measured (UTC)	Members	Change
21 Aug 2026, 06:48	17	first reading

Ownership

Owned by user #166796343 as measured.

Members we’ve seen

@VaultTecMainframe — [DEV] Vault-Tec Engineer (rank 162)

Lone (@LonelyRBX) — [DEV] Vault-Tec Engineer (rank 162)

GrumpyMan (@Alexwolfopgamerlol) — [VD] Vault Dwellers (rank 1)

A sample — only members this register has independently measured, highest rank first. Not the full roster.

Rank structure

[OS] Overseer1

[DOS] Deputy Overseer0

[DEV] Vault-Tec Engineer3

[CoS] Chief of Staff0

[C] Chairman0

[DM] Division Managers0

[DDM] Deputy Division Managers0

[DS] Division Staff0

[GS] Game Staff0

[FA] Foreign Ambassadors0

[VS] Vault Security0

[VM] Vault Medical0

[VE] Vault Engineers0

[VS] Vault Scientists0

[S] Subjects0

Member17

[VD] Vault Dwellers13

Guest0

Roles and per-rank member counts as Roblox reports them (rank 0 = guest … 255 = owner).

Related groups

Groups whose measured members overlap with this one — a sample from our membership graph.

Project: Havenpoint Development#5659983 · 3 shared members

Fallout: Vault 15#4742807 · 2 shared members

1,926

The Commonwealth Wastelands#2600263 · 2 shared members

1,000

[Vault Tec] Vault 57#6070576 · 2 shared members

Lonely Productions#4671070 · 2 shared members

[Vault Tec]#6086127 · 2 shared members

[Vault 57] Maintenance Division#7657288 · 2 shared members

[Vault 57] Medical Division#7657251 · 2 shared members

[Vault 57] Security Division#7657230 · 2 shared members

[Vault 57] Science Division#7657269 · 2 shared members

Chillz Studios#2782840 · 1 shared members

18,407,653

|BA| British Army#2621202 · 1 shared members

2,021,982

Open data

Download this group’s measured record — free to reuse with attribution: membership history (CSV) · full record (JSON)

Each file carries its licence and retrieval time inside it, and is generated from the same measurements shown above.