MJC @MarkJeffersonCounty #1207566941
17 August 2019
account created (per Roblox API)
27 Sept 2026, 12:18
last measured (UTC)
Username record
@MarkJeffersonCounty — observed 27 September 2026
Roblox’s API lists prior usernames without dates; the dates above are when this register observed each name, which bounds — but is not — the change date.
Groups owned (as measured)
Open data
Download this user’s observed record: username history (CSV) · record (JSON)
Also a member of
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55,335Paddleboat Shipping Universe#4655747 · Fan
1,995Membership and rank as measured from this user’s public group list.