O2Jammers please answer?

Question

what does the code below the room no. mean?
(like NX4, HX4, EX1... etc... there's a lot)

please answer!! thanks...

Answer 1

Well when I need help with games I go to http://www.gamefaqs.com I usually find the answers I need.

Answer 2

I reply first, and if the answering makes me consider or makes my day, then I'll megastar. I recognise...it is choosy of me, sorry. o.o But this manner I come to be pointing my fanatics and contacts to the *well stuff* you recognize? ^__^ Or a minimum of I attempt to. But have a celeb besides only for being sufferer and know-how. ^_^