Kalimdor

Azuremyst Isle (A) - 1-10
Durotar (H) - 1-10
Mulgore (H) - 1-10
Teldrassil (A) - 1-10
Bloodmyst Isle (A) - 10-20
Darkshore (A) - 10-20
Barrens (H) - 10-25
* Ragefire Chasm (H) - 13-18
Stonetalon Mountains (C) - 15-27
* Wailing Caverns (H) - 17-24
Ashenvale (C) - 18-30
* Blackfathom Depths (C) - 24-32
Thousand Needles (C) - 25-35
* Razorfen Kraul (H) - 29-38
Desolace (C) - 30-40
Dustwallow Marsh (C) - 35-45
* Maraudon (H) - 46-55
* Razorfen Downs (H) - 37-46
Tanaris (A) - 40-50
Feralas (A) - 40-50
* Zul'Farrak - 44-54
Aszhara (A) - 45-55
Felwood (A) -48-55
Ungoro Crater (C) - 48-55
Moonglade (C) - 50-60
Winterspring (A) - 55-60
Silithus (C) - 55-60
* Dire Maul - 55-60
* Ahn'Qiraj - 60-70
* Onyxia's Lair - 60-65
* Caverns of Time - 66-70

Eastern Kingdoms

Dun Morogh (A) - 1-10
Elwynn Forest (A) - 1-10
Eversong Forest (H) - 1-10
Tirisfal Glades (H) - 1-10
Ghostlands (H) - 10-20
Loch Modan (A) - 10-20
Silverpine Forest (H) - 10-20
Westfall (A) - 10-20
Redridge Mountains (C) - 15-25
* Deadmines (A) - 17-26
Duskwood (C) - 18-30
Wetlands (C) - 20-30
Hillsbrad Foothills (C) - 20-30
* Shadowfang Keep (H) - 22-30
* Stockades (A) - 24-32
* Gnomeregan (A) - 29-38
Alterac Mountains (C) - 30-40
Arathi Highlands (C) - 30-40
Stranglethorn Vale (C) - 30-45
Badlands (C) - 35-45
Swamp of Sorrows (A) - 35-45
* Scarlet Monastery (A) - 34-45
* Uldaman - 41-51
Searing Gorge (A) - 43-50
Hinterlands (C) - 45-50
Blasted Lands (A) - 45-55
* Blackrock Depths -48-56
Burning Steppes (C) - 50-58
* Temple of Atal' Hakkar -50-60
Western Plaguelands (C) - 51-58
Eastern Plaguelands (C) - 53-60
Deadwind Pass (C) - 55-60
* Blackrock Spire - 55-60
* Scholomance - 58-60
* Stratholme - 58-60
* Blackwing Lair - 60-70
* Molten Core - 60-70
* Naxxramas -60-70
* Zul’Gurub - 60-70
* Karazhan - 70
* Zul'Aman -70

Outland

Hellfire Peninsula (C) - 58-63
* Hellfire Citadel – 60-70
Zangarmarsh (C) - 60-64
* Coilfang Reservoir - 62-70
Terokkar Forest (C) - 62-65
Nagrand (C) - 64-67
* Auchindoun - 65-70
Blade's Edge Mountains (C) - 65-68
Netherstorm (C) - 67-70
Shadowmoon Valley (C) - 67-70
* Black Temple - 70
* Gruul's Lair - 70
* Tempest Keep - 70