If you need a description of these informations, go to the bottom of this post.
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Cataclysm Dungeons
X 5 - Throne of the Tides (ToT) 77 (i226), 80-82
X 5 - Blackrock Caverns (BC) 77 (i226), 80-82
✔ 5 - The Stonecore (SC) 81 (i272), 81-84
✔ 5 - Vortex Pinnacle (VP) 81 (i272), 81-84
✔ 5 - Lost City of the Tol'vir (LCoT) 83 (i305), 85
✔ 5 - Halls of Origination (HoO) 83 (i305), 85
✔ 5 - Grim Batol (GBD) 84 (i305), 85
Cataclysm Heroic Dungeons
X 5 - Throne of the Tides (H) (H-ToT) 85 (i329)
X 5 - Blackrock Caverns (H) (H-BC) 85 (i329)
✔ 5 - The Stonecore (H) (H-SC) 85 (i329)
✔ 5 - Vortex Pinnacle (H) (H-VP) 85 (i329)
✔ 5 - Lost City of the Tol'vir (H) (H-LCoT) 85 (i329)
✔ 5 - Halls of Origination (H) (H-HoO) 85 (i329)
✔ 5 - Grim Batol (H) (H-GB) 85 (i329)
✔ 5 - Deadmines (H) (H-DM/H-VC) 85 (i329)
✔ 5 - Shadowfang Keep (H) (H-SFK) 85 (i329)
✔ 5 - Zul'Aman (H) (ZA) 85 (i346)
✔ 5 - Zul'Gurub (H) (ZG) 85 (i346)
X 5 - End Time (H) (ET) 85 (i353)
X 5 - Well of Eternity (H) (WoE) 85 (i353)
X 5 - Hour of Twilight (H) (HoT) 85 (i353)
Cataclysm Raids
X 10/25 - Baradin Hold - Argaloth (Occ10/Occ25) 85 (i340) Note*
✔ 10/25 - Bastion of Twilight (BoT10/BoT25) 85 (i350) Note: Boss 1,2,3 available & Heroics are closed
X 10/25 - Throne of the Four Winds (TFW10/TFW25) 85 (i350)
✔ 10/25 - Blackwing Descent (BD10/BD25/BWD/NEF) 85 (i350)
X 10/25 - Firelands - Occu'thar (Occ10/Occ25) 85 (i372) Note*
✔ 10/25 - Firelands (FL/FIRE 10/25) 85 (i372) - note: Beth'tilac, Lord Rhyolith, Shannox, Baleroc, Alysrazor, Majordomo Staghelm & Trash events are now available
X 10/25 - Dragon Soul (DS 10/25/LFR(25)) 85 (i372)
Note* = (Requires the control of Tol Barad)
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Wrath of the Lich King Dungeons
X 5 - Utgarde Keep (UK/UTK) 67, 67-68
X 5 - The Nexus (Nexus/Nex) 68
✔ 5 - Ahn'kahet: The Old Kingdom [(ANK/OLD/AKO/OK) 70
X 5 - Azjol-Nerub (AZN/AN) 69
X 5 - Drak'Tharon Keep (DTK) 71
✔ 5 - The Violet Hold (VH) 72
X 5 - Gundrak (GD) 73
X 5 - Halls of Stone (HOS) 74
✔ 5 - Halls of Lightning (HOL) 75
X 5 - The Oculus (Occ) 75
X 5 - Caverns of Time: Culling of Stratholme (Culling/COS) 75
X 5 - Utgarde Pinnacle (UP) 75
X 5 - Trial of the Champion (Champ/ToC) 75
X 5 - Forge of Souls (FoS) 75
X 5 - Pit of Saron (PoS) 78
X 5 - Halls of Reflection (HoR) 78
Wrath of the Lich King Heroic Dungeons
X 5 - Utgarde Keep (H) (H-UK/H-UTK) 80
X 5 - The Nexus (H) (H-Nexus/H-Nex) 80
✔ 5 - Ahn'kahet: The Old Kingdom (H) (H-ANK/H-OLD/H-OK) 80
X 5 - Azjol-Nerub (H) (H-AZN/H-AN) 80
X 5 - Drak'Tharon Keep (H) (H-DTK) 80
✔ 5 - The Violet Hold (H) (H-VH) 80
X 5 - Gundrak (H) (H-Gundrak/H-GD) 80
X 5 - Halls of Stone (H) (H-HOS) 80
✔ 5 - Halls of Lightning (H) (H-HOL) 80
X 5 - The Oculus (H) (H-Oculus/H-Occ) 80
X 5 - Caverns of Time: Culling of Stratholme (H) (H-Culling/H-COS) 80
X 5 - Utgarde Pinnacle (H) (H-UP) 80
X 5 - Trial of the Champion (H) (ToC hc/H-Champ) 80
X 5 - Forge of Souls (H) (H-FoS) 80
X 5 - Pit of Saron (H) (H-PoS) 80
X 5 - Halls of Reflection (H) (H-HoR) 80
Wrath of the Lich King Raids
NOTE: All raid dungeons are accessible to both 10-player and 25-player size raid groups with separate gear progression paths in each respective raid model.
X 10/25 - Naxxramas (Naxx10/Naxx25) 80
X 10/25 - Obsidian Sanctum (OS/Sarth10/25) 80
X 10/25 - Vault of Archavon - Archavon (Vault/VoA10/25) 80
X 10/25 - The Eye of Eternity (Maly/EoE10/25) 80
X 10/25 - Vault of Archavon - Emalon (Vault/VoA10/25) 80 Note*
X 10/25 - Ulduar (Uld10/25) 80
X 10/25 - Vault of Archavon - Koralon (Vault/VoA10/25) 80 Note*
X 10/25 - Trial of the Crusader (TC/TotC10/25) 80
X 10/25 - Onyxia's Lair (Ony10/Ony25) 80
X 10/25 - Trial of the Grand Crusader (TGC/ToGC10/25) 80
X 10/25 - Vault of Archavon - Toravon (Vault/VoA10/25) 80 Note*
✔ 10/25 - Ruby Sanctum (RS/Hal10/25) 80 + all modes
X 10/25 - Icecrown Citadel (ICC) 80
Note* = (Requires Wintergasp controle)
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Burning Crusade Dungeons
X 5 - Hellfire Citadel: Hellfire Ramparts (Ramps) 57, 57-67
X 5 - Hellfire Citadel: The Blood Furnace (BF) 58, 59-68
X 5 - Coilfang Reservoir: Slave Pens (SP) 59, 60-69
X] 5 - Coilfang Reservoir: The Underbog(UB) 60, 61-70
X 5 - Auchindoun: Mana-Tombs (MT) 61, 62-71
X 5 - Auchindoun: Auchenai Crypts (AC) 62, 63-72
X 5 - Caverns of Time: Escape from Durnholde Keep (OH, DH, DK or Durn) 63, 64-73
X 5 - Auchindoun: Sethekk Halls (AS, Seth, Seth Halls) 63, 65-73
X 5 - Coilfang Reservoir: The Steamvault (SV) 65, 67-75
X 5 - Caverns of Time: Opening the Dark Portal (Black Morass) (BM) 65, 68-75
X 5 - Auchindoun: Shadow Labyrinth (SL or Slabs) 65, 67-75
X 5 - Hellfire Citadel: Shattered Halls (SH or Shatt Halls) 65, 67-75
X 5 - Tempest Keep: The Mechanar (Mech) 67, 67-75
X 5 - Tempest Keep: The Botanica (Bot) 67, 67-75
X 5 - Tempest Keep: The Arcatraz (Arc) 65, 68-75
X 5 - Magisters' Terrace (MgT, Terrace) 65, 68-75
Burning Crusade Heroic Dungeons
X 5 - Hellfire Citadel: Hellfire Ramparts (H Ramps) 58
X 5 - Hellfire Citadel: The Blood Furnace (H BF) 58
X 5 - Coilfang Reservoir: Slave Pens (H SP) 66
X 5 - Coilfang Reservoir: The Underbog (H UB) 70
X 5 - Auchindoun: Mana-Tombs (H MT) 70
X 5 - Auchindoun: Auchenai Crypts (H AC) 70
X 5 - Auchindoun: Sethekk Halls (H Seth Halls) 70
X 5 - Coilfang Reservoir: The Steamvault (H SV) 70
X 5 - Auchindoun: Shadow Labyrinth (H SL or H Slabs) 70
X 5 - Caverns of Time: Escape from Durnholde Keep (H Durn) 70
X 5 - Caverns of Time: Opening the Dark Portal (H BM) 70
X 5 - Hellfire Citadel: Shattered Halls (SH or Shatt Halls) 70
X 5 - Tempest Keep: The Mechanar (H Mech) 70
X 5 - Tempest Keep: The Botanica (H Bot) 70
X 5 - Tempest Keep: The Arcatraz (H Arc) 70
X 5 - Magisters' Terrace (H MgT) 70
Burning Crusade Raids
X 20 - Karazhan (Kara or KZ) 68
X 25 - Gruul's Lair (Gruul) 70
X 25 - Hellfire Citadel: Magtheridon's Lair (Mags) 70
X 10 - Zul'Aman (ZA) 68 added 2.3.0 moved 4.0.3
X 25 - Coilfang Reservoir: Serpentshrine Cavern (SSC) 70
X 25 - Tempest Keep: The Eye (TK) 70
X 25 - Caverns of Time: Battle for Mount Hyjal (Hyjal) 66
X 25 - Black Temple (BT) 70
X 25 - Sunwell Plateau (Sunwell or SWP) 70
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Dungeons
✔ 5 - Ragefire Chasm (RFC) 10, 15-21
✔ 5 - Deadmines (DM or VC) 10, 15-21
✔ 5 - Wailing Caverns (WC) 10, 15-25
X 5 - Shadowfang Keep (SFK) 11, 16-26
✔ 5 - Blackfathom Deeps (BFD) 15, 20-30
✔ 5 - The Stockade (Stocks or Stockade or SWS) 15, 20-30
✔ 5 - Gnomeregan (Gnomer) 19, 24-34
X 5 - Scarlet Monastery: Graveyard (SM) 21, 26-36
X 5 - Scarlet Monastery: Libary (SM) 21, 29-39
X 5 - Razorfen Kraul (RFK) 25, 30-40
✔ 5 - Maraudon: The Wicked Grotto (Mara) 25, 30-40
X 5 - Scarlet Monastery: Armory (SM) 21, 32-42
✔ 5 - Maraudon: Foulspore Cavern (Mara) 25, 32-42
✔ 5 - Maraudon: Earth Song Falls (Mara) 25, 34-44
X 5 - Scarlet Monastery: Cathedral (SM) 21, 35-45
X 5 - Uldaman (Uld) 30, 35-45
X 5 - Dire Maul: Warpwood Quarter (DM) 31, 36-46
X 5 - Scholomance (Scholo) 33, 38-48
X 5 - Dire Maul: Capital Gardens (DM) 31, 39-49
X 5 - Razorfen Downs (RFD) 35, 40-50
X 5 - Dire Maul: Gordock Commons (DM) 31, 42-52
X 5 - Stratholme: Main Gate (Strat) 37, 42-52
X 5 - Zul'Farrak (ZF) 39, 44-54
X 5 - Stratholme: Service Entrance (Strat) 37, 46-56
X 5 - Blackrock Depths: Detention Block (BRD) 42, 47-57
X 5 - Temple of Atal'Hakkar (Sunken Temple, ST) 45, 50-60
X 5 - Blackrock Depths: Upper City (BRD) 46, 51-61
X 5 - Lower Blackrock Spire (LBRS) 48, 55-65
X 5 - Upper Blackrock Spire (UBRS) 48, 55-65
Raids
X 20 - Zul'Gurub (ZG) 50, 56-60 added 1.7.0 moved 4.0.3
X 40 - Onyxia's Lair (Ony) 60 moved 3.2.2
X 40 - Molten Core (MC) 50 (Attunement Quest at 55), 60
X 40 - Blackwing Lair (BWL) 55, 60
X 10 - Ruins of Ahn'Qiraj (Ony) 50, 60 tuned for 10 player 4.0.3
X 40 - Temple of Ahn'Qiraj (TAQ or AQ40) 50, 60
X 40 - Naxxramas 60 added 1.11.0 moved 3.0.2
Quick Sep-By-Step Description:
example:
✔ 5 - Throne of the Tides (ToT) 77 (i226), 80-82
✔ 5 - Throne of the Tides (ToT) 77 (i226), 80-82
"✔" = Symbol for: available
"5" = How many people are maximum able to enter this dungeon / raid
"Throne of the Tides" = complete dungeon / raid name
"(ToT)" = abbreviated version of the dungeon / raid name
"77" = This number tells you which Level you atleast need, to be >able< to enter this dungeon / raid
"(i226)" = Tells you the requirement of your Item Level to enter this dungeon / raid
"80-82" = This is the most suitable Level to enter this dungeon / raid

