Roblox RegisterIndependent record of Roblox groups · not affiliated with Roblox Corporation
HMS prison

HMS prison #34303727

3
members (measured 3 Nov 2026, 17:25 UTC)
13 May 2024
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 We do not publish numbers we have not measured.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)MembersChange
19 Aug 2026, 16:173first reading

Daily: the last measured count of each UTC day. Days with no new reading have no point. The full per-reading record is in the CSV and JSON downloads below.

Ownership

Owned by Blaine_County2026 (@Blaine_County2022) as measured.

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

Members we’ve seen

Blaine_County2026 (@Blaine_County2022) — COLONEL (rank 255)

@ajbum93 — CADET (rank 1)

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

Rank structure

Founder1
Assistant Founder0
Co-Founder0
Assistant Co-Founder0
NPAS1
British Army1
The Royal Family1
HM Government1
Ministry of Justice1
British Armed Forces1
London Fire Brigade1
London Ambulance Service1
Metropolitan Police Service1
Member3
Civilian1
Guest0

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

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.