I have not got a "good" voice but I can go from D to G - ie two and a bit octaves - but at either end for about three semitones I prefer to be singing harmony to another singer.

My tenor, Royston, can do an A, and in a manly voice (unlike John Denver, who sounds a bit girly everywhere in his range). I'm pretty sure that both John Matthews (Wee Jock of this forum) and the late Dave Bryant of this forum could do B, and Dave probably a C.

Clive Lever (Clever Evil of this forum) I think went soaring past A - he did a parody of "Piano Man" that I think required it. He aso has a very versatile verse of very good quality.