[+ Vault 31 +] #33702077

11

members (measured 13 Oct 2026, 16:33 UTC)

12 January 2024

created (per Roblox API)

10 August 2026

first measured by this register

Membership history

Growth

2 measurements spanning 25 days, net -1. Dots are measurements; the straight line between them is drawn to join them, not to claim we know the path taken in between — snapshots are recorded only when a count changes, so gaps mean “no change observed”, never “interpolated”. The vertical axis spans 11–12 and does not start at zero.

Measurement log — every members count we have recorded
Measured (UTC)	Members	Change
13 Sept 2026, 13:51	11	-1
19 Aug 2026, 16:01	12	first reading

Ownership

Owned by Mark (@samisabutterfly) as measured.

Groups seen changing owner — the largest ever handed over and the most recent — are on the ownership transfers board.

Experiences

0

players in this group’s experiences right now

11

lifetime visits across 1 experiences

Nuka World! (WIP)0 playing now

Experiences this group owns, by lifetime visits. Live-player counts are from our last measurement.

Members we’ve seen

Mark (@samisabutterfly) — The Overseer (rank 255)

Boston (@BostonFighter) — Head of Security (rank 254)

Q_Dingle (@SCP_682AB) — Vault Dweller (rank 5)

Kat (@Katnzp) — Vault Dweller (rank 5)

TinkleDinkle (@gigabiteuse) — Vault Dweller (rank 5) terminated

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

Rank structure

The Overseer1

Vault-Tec Board0

Head of Medical0

Head of Security1

Head of Maintenance0

The Assistant Overseer1

Vault 31 Security1

Vault Dweller8

Vault 31 Maintenance Vault Dwellers0

Vault 31 Medical Division0

Member12

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.

Names Are Not Important#8731481 · 3 shared members

Vault 52#8652530 · 3 shared members

Car Crushers Community#2726951 · 2 shared members

USSF - United States Special Forces#22025 · 2 shared members

Hapless Studios#5502618 · 2 shared members

Jaller's Projects#266819 · 2 shared members

SCP Futuristic Group#3185747 · 2 shared members

Vault 61#5179520 · 2 shared members

Orange Colored Skies#8027732 · 2 shared members

=Vault 47=#14684960 · 2 shared members

Purrfect Empire#4671410 · 2 shared members

The Purrfect Empire#33457121 · 2 shared members

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.