Level ranges Blizzard has published
In the development notes updated on 1 October, Blizzard raised the level cap to 30 and listed these dungeons with their level ranges (beta development notes):
- Excavation Site: Wetlands, levels 26-31 (new in Forever)
- Razorfen Downs, levels 25+
- Uldaman, levels 30+
The same notes say dungeon quests now give 50% less extra experience than before.
The other dungeons
The notes name Ragefire Chasm, Wailing Caverns, The Deadmines, Shadowfang Keep, The Stockade, Blackfathom Deeps, Gnomeregan, Razorfen Kraul and Scarlet Monastery as available, but give no level ranges for them. Browse the dungeon list for bosses and loot. Level ranges on those pages come from an add-on that ships with the beta, not from Blizzard, so use them as a rough guide only.