The site boards were split into five categories: Furry Related, The Basement, General, Indices and Misc.
- /fur/ - Furries
- /c/ - Furry Comics
- /gfur/ - Gay Furries
- /gc/ - Gay Furry Comics
- /i/ - Intersex
- /scale/ - Scalies
- /rs/ - Requests & Source
- /a/ - Animated
- /aw/ - Cute
- /d/ - Discussion
- /mu/ - Music
- /w/ - Wallpapers
- /v/ - Video Games
- /lo/ - Lounge
- /tech/ - Technology
- /lit/ - Literature
- /ifur/ - Furries Index
- /ic/ - Furry Comics Index
- /igfur/ - Gay Furries Index
- /igc/ - Gay Furry Comics Index
- /b/ - Traffic Data
- /guide/ - U-18Chan Guide
- /gp/ - Gentlemen Protocol
- /vlkyra/ - Valkyria
- /rules/ - Rules and FAQ
- /chat/ - Chat
The lounge board was a board for general chatting and random threads, while the discussion board was for discussions, debates or arguments. The most popular of the furry boards was Gay Furry Comics, with double the number of threads of any other board.
/r/ - Recent and Search had to be removed after security concerns.
The Indices section were simply links to the Catalogues of the first five boards in Furry Related.
U-18Chan's first mascot, a cat in SS uniform, was taken from the German imageboard Krautchan. The second and current mascot, a sergal in SS uniform, was drawn by Yuuri and then named Valkyria through a competition held by Jay. Further drawings of Valkria have been done by SpazzyKoneko including different versions for each holiday so far. Every drawing of the current mascot is hosted in full resolution on a special page.
Due to the limitations of Kusaba X, U-18Chan was forced to switch over to the more efficient ImageBoard4Free software, which was provided to U-18Chan by Infinitus of ib4f.com. U-18Chan successfully switched to ImageBoard4Free during summer 2011 and was able to clean up some of the bugs created during the switch. U-18Chan has worked on new site software in the past but with the departure of the sole coder there has been no further progress.
For April 1, 2012, the website's main page had an upside-down announcement that read "U-18Chan is now hosted in northern Australia. Edit: We have had some reports of the site appearing upside down for some users. This is most likely due to upside down packets coming from ISPs running outdated firmware. Please contact them and ask about Australian compatibility if you are experiencing this issue." The site was not actually moved to Australia, but the news post has remained on the front page with the April 1st time stamp and upside down text.
- FAQ Etymology of U-18Chan
- /gc/ - Gay Furry Comics Compare the number of pages on /gc/ to other boards
- U-18Chan News post 28/03/13 Recent and Search Removed
- U-18Chan News post 28/07/11 'Things Are About To Get German'
- U-18Chan Owner's Blog Thoughts about closing U-18Chan
- U-18Chan News post 01/04/12 'Server Migration'