# Roblox Register — full dataset description

> The independent, measured record of Roblox groups (communities). Member counts,
> growth history, ownership transfers, name history, a membership graph, and an
> archive of what has been deleted — all read directly from public Roblox APIs and
> stamped with when they were taken. Independent; not affiliated with, endorsed by,
> or sponsored by Roblox Corporation.

## What this dataset is

Roblox group IDs are sequential integers up to ~1.11 billion. Roblox Register walks that
ID space (a census) and, separately, follows Roblox search and user-membership to
surface active groups. For every group it can measure, it records the group over time
rather than a single snapshot — so the value is the HISTORY, which cannot be
reconstructed after the fact by anyone who was not already recording it.

## Current size (measured, as of this request)

- Groups measured live: 21,463,027
- Groups with a measured member count: 4,594,199
- Total measured membership across those groups: 7,803,601,021
- Verified-badge groups: 4,681
- Ownerless (claimable) groups: 2,141,363
- Membership-graph edges (user↔group with rank): 32,178,898
- Ownership-change events observed: 5,257
- Point-in-time snapshots held: 34,041,396
- Users measured: 805,111 (of which terminated: 68,248)
- Largest single measured group: 119,481,338 members

These are counts of rows actually measured. The census queue behind them is not
coverage and is never included in any figure here.

## Methodology (what the numbers mean)

- Insert-on-change history: a new snapshot is written only when a value changed; a
  re-reading that agrees is recorded as a confirmation, not a new point. Charts are
  therefore sparse by design and are only drawn once ≥2 points exist.
- Deletions: a group that stops answering is a CANDIDATE; it is recorded as deleted
  only after a second independent read ≥24h later also returns Roblox’s explicit
  "invalid or does not exist". Rate limits, server errors and timeouts never count.
- Terminations: Roblox reports the status but not the date; we record OUR detection
  date and say so, never a claimed ban date.
- Ownership/renames: detected by comparing consecutive sweeps; the date shown bounds
  when we observed the change, never the instant it happened.
- Nothing is estimated and no page exists for a group we have not measured.

## How to read a page

- Group pages: /group/{numeric id}. The id is canonical and rename-proof; former
  names resolve to it. Pages show measured member count, creation date (from Roblox),
  membership history, ownership record, and name history.
- User pages: /user/{numeric id} — username history and groups owned, with account
  status (including terminated, with our detection date).

## Largest measured groups right now

- SecretVerse Studio — 119,492,641 members — https://roregister.com/group/1074557114
- 크롱 스튜디오 — 54,473,420 members — https://roregister.com/group/35669818
- Nosniy Games — 52,980,004 members — https://roregister.com/group/3461453
- Catalog Avatar Creator — 40,183,482 members — https://roregister.com/group/15102943
- BRAZILIAN SPYDER — 38,906,920 members — https://roregister.com/group/35815907
- Blue Lock Rivals Unofficial Fans — 32,505,638 members — https://roregister.com/group/34671275
- lol games.. — 32,021,236 members — https://roregister.com/group/12208023
- Wiggity. — 30,194,841 members — https://roregister.com/group/12836673
- Scriptbloxian Studios — 30,038,706 members — https://roregister.com/group/4705120
- BIG Games Pets — 29,207,581 members — https://roregister.com/group/3959677
- Team Sploshy — 27,213,986 members — https://roregister.com/group/2937793
- Yielding Arts — 24,684,581 members — https://roregister.com/group/12013007
- LSPLASH — 23,766,922 members — https://roregister.com/group/3049798
- 100% ALGO SHOT — 23,140,530 members — https://roregister.com/group/1008902725
- Mukbang Corner — 23,078,817 members — https://roregister.com/group/494523617
- Megastar Studios — 22,041,652 members — https://roregister.com/group/35864728
- No More Flops — 21,684,713 members — https://roregister.com/group/1041977165
- The Garden Game — 19,466,693 members — https://roregister.com/group/35789249
- Johnny Lava — 19,352,639 members — https://roregister.com/group/876852426
- Gamer Robot Inc — 19,279,988 members — https://roregister.com/group/4372130
- Rainy Creations! — 18,961,706 members — https://roregister.com/group/35542880
- Chillz Studios — 18,365,823 members — https://roregister.com/group/2782840
- Bee Swarm Simulator Club — 18,208,026 members — https://roregister.com/group/3982592
- Sonar Studios — 18,019,093 members — https://roregister.com/group/2919215
- Current. — 17,995,757 members — https://roregister.com/group/34852864

## Open data / API

Every measured group and user exposes its record as a download, free to reuse with
attribution to roregister.com (each file states its licence and retrieval time inside it):

- https://roregister.com/group/{id}/history.csv — a group's measured member-count history (CSV)
- https://roregister.com/group/{id}/history.json — full group record: history, name changes, ownership (JSON)
- https://roregister.com/user/{id}/usernames.csv — a user's observed username history (CSV)
- https://roregister.com/user/{id}/usernames.json — full user record (JSON)
- https://roregister.com/sitemap.xml — index of group pages that have earned publication

The {id} is the numeric Roblox group/user id (canonical, rename-proof). Group pages also
carry schema.org Dataset markup pointing at these downloads.

## Update cadence

The register runs continuously. Large groups are re-measured daily, mid-size every
few days, the long tail monthly; search-seeded discovery runs every 10 minutes. This
file and the sitemap regenerate from the live database on every request.

## Related

- Short version: https://roregister.com/llms.txt
- Methodology: https://roregister.com/methodology
- Browse: https://roregister.com/browse