{
  "meta": {
    "subject": "Roblox group 3915601",
    "retrieved": "2026-09-07T17:13:07.449Z",
    "licence": "Measured by roregister.com from public Roblox APIs. Free to reuse with attribution to roregister.com. Not affiliated with Roblox Corporation.",
    "notes": {
      "member_history": "insert-on-change; a point exists only where the value differed from the prior reading.",
      "detection_dates": "ownership/name changes are dated when this register observed them, not when they happened."
    }
  },
  "group": {
    "id": 3915601,
    "name": "Illinois Railway Museum",
    "created": "2018-02-26T23:18:16.243Z",
    "owner_user_id": 149690593,
    "member_count": 826,
    "has_verified_badge": false,
    "is_locked": false,
    "status": "live",
    "first_measured": "2026-08-10T12:14:55.994Z",
    "last_measured": "2026-09-07T15:21:31.523Z"
  },
  "member_history": [
    {
      "measured_at": "2026-08-10T12:14:55.994Z",
      "member_count": 810
    },
    {
      "measured_at": "2026-08-10T23:31:08.152Z",
      "member_count": 811
    },
    {
      "measured_at": "2026-08-13T03:01:52.479Z",
      "member_count": 813
    },
    {
      "measured_at": "2026-08-15T12:12:25.789Z",
      "member_count": 815
    },
    {
      "measured_at": "2026-08-15T15:02:08.139Z",
      "member_count": 816
    },
    {
      "measured_at": "2026-08-20T22:20:47.614Z",
      "member_count": 817
    },
    {
      "measured_at": "2026-08-22T01:01:48.467Z",
      "member_count": 818
    },
    {
      "measured_at": "2026-08-23T20:51:58.970Z",
      "member_count": 820
    },
    {
      "measured_at": "2026-08-25T03:22:12.463Z",
      "member_count": 821
    },
    {
      "measured_at": "2026-08-27T22:11:36.047Z",
      "member_count": 822
    },
    {
      "measured_at": "2026-08-30T17:00:48.574Z",
      "member_count": 823
    },
    {
      "measured_at": "2026-08-31T11:50:49.737Z",
      "member_count": 824
    },
    {
      "measured_at": "2026-09-05T00:32:42.212Z",
      "member_count": 825
    },
    {
      "measured_at": "2026-09-06T01:01:52.351Z",
      "member_count": 826
    }
  ],
  "name_history": [
    {
      "name": "Illinois Railway Museum",
      "first_seen": "2026-08-10T12:14:55.994Z",
      "last_seen": "2026-09-07T15:21:31.523Z",
      "current": true
    }
  ],
  "ownership_events": [
    {
      "observed_at": "2026-08-10T13:44:20.163Z",
      "previous_owner": null,
      "new_owner": 149690593
    }
  ]
}