For now...
First FR campaign, from level 1 to 7, campaign stopped on hiatus there.
Second FR campaign (Northern Journey), character went from level 1 to 10, died.
The "one shot campaign": level 1 to 2. Was supposed to be a filler setting for when the FR DM lacks inspiration, but was completely dropped after just one game.
First oriental campaign: level 1 to 5.
Second oriental campaign: level 10 to 11.
First PBP: level 1 to 3, ongoing.
Second PBP: level 4 to 4, stopped by other players.
Third PBP: level 3 to 3, stopped by disappearing DM.
Fourth PBP: level 4 to 4, hopefully not stopped, just a bit slow...
And for the campaign I DM myself, they've been from level 1 to 8.
So, here it is, my highest character is level 11. To be honest, I've also a level 12 character, but it's an NPC (with NPC array and gear value) and the rest of the team is only keeping her as long as they need a meatshield (since said meatshield is also a Zentharim spy, and they know it).