diff --git a/src/game/Guild.cpp b/src/game/Guild.cpp
index 8076757b5..bf6a3ab18 100644
--- a/src/game/Guild.cpp
+++ b/src/game/Guild.cpp
@@ -363,7 +363,7 @@ bool Guild::FillPlayerData(uint64 guid, MemberSlot* memslot)
             return false;
 
         plLevel = Player::GetUInt32ValueFromDB(UNIT_FIELD_LEVEL, guid);
-        if(plLevel<1||plLevel>255)                          // can be at broken `data` field
+        if(plLevel<1||plLevel>STRONG_MAX_LEVEL)             // can be at broken `data` field
         {
             sLog.outError("Player (GUID: %u) has a broken data in field `characters`.`data`.",GUID_LOPART(guid));
             return false;
diff --git a/src/game/Level3.cpp b/src/game/Level3.cpp
index 4b6372f53..8ede8ba91 100644
--- a/src/game/Level3.cpp
+++ b/src/game/Level3.cpp
@@ -3805,8 +3805,8 @@ bool ChatHandler::HandleLevelUpCommand(const char* args)
     int32 newlevel = oldlevel + addlevel;
     if(newlevel < 1)
         newlevel = 1;
-    if(newlevel > 255)                                      // hardcoded maximum level
-        newlevel = 255;
+    if(newlevel > STRONG_MAX_LEVEL)                         // hardcoded maximum level
+        newlevel = STRONG_MAX_LEVEL;
 
     if(chr)
     {
diff --git a/src/game/MiscHandler.cpp b/src/game/MiscHandler.cpp
index b2c7d7d5a..881270189 100644
--- a/src/game/MiscHandler.cpp
+++ b/src/game/MiscHandler.cpp
@@ -80,7 +80,7 @@ void WorldSession::HandleWhoOpcode( WorldPacket & recv_data )
     std::string player_name, guild_name;
 
     recv_data >> level_min;                                 // maximal player level, default 0
-    recv_data >> level_max;                                 // minimal player level, default 100
+    recv_data >> level_max;                                 // minimal player level, default 100 (MAX_LEVEL)
     recv_data >> player_name;                               // player name, case sensitive...
 
     // recheck
@@ -145,8 +145,8 @@ void WorldSession::HandleWhoOpcode( WorldPacket & recv_data )
 
     // client send in case not set max level value 100 but mangos support 255 max level,
     // update it to show GMs with characters after 100 level
-    if(level_max >= 100)
-        level_max = 255;
+    if(level_max >= MAX_LEVEL)
+        level_max = STRONG_MAX_LEVEL;
 
     uint32 team = _player->GetTeam();
     uint32 security = GetSecurity();
diff --git a/src/game/ObjectMgr.cpp b/src/game/ObjectMgr.cpp
index 1fbdf62c8..040c3ce35 100644
--- a/src/game/ObjectMgr.cpp
+++ b/src/game/ObjectMgr.cpp
@@ -1909,8 +1909,8 @@ void ObjectMgr::LoadPetLevelInfo()
             uint32 current_level = fields[1].GetUInt32();
             if(current_level > sWorld.getConfig(CONFIG_MAX_PLAYER_LEVEL))
             {
-                if(current_level > 255)                     // hardcoded level maximum
-                    sLog.outErrorDb("Wrong (> 255) level %u in `pet_levelstats` table, ignoring.",current_level);
+                if(current_level > STRONG_MAX_LEVEL)        // hardcoded level maximum
+                    sLog.outErrorDb("Wrong (> %u) level %u in `pet_levelstats` table, ignoring.",STRONG_MAX_LEVEL,current_level);
                 else
                     sLog.outDetail("Unused (> MaxPlayerLevel in mangosd.conf) level %u in `pet_levelstats` table, ignoring.",current_level);
                 continue;
@@ -2286,8 +2286,8 @@ void ObjectMgr::LoadPlayerInfo()
             uint32 current_level = fields[1].GetUInt32();
             if(current_level > sWorld.getConfig(CONFIG_MAX_PLAYER_LEVEL))
             {
-                if(current_level > 255)                     // hardcoded level maximum
-                    sLog.outErrorDb("Wrong (> 255) level %u in `player_classlevelstats` table, ignoring.",current_level);
+                if(current_level > STRONG_MAX_LEVEL)        // hardcoded level maximum
+                    sLog.outErrorDb("Wrong (> %u) level %u in `player_classlevelstats` table, ignoring.",STRONG_MAX_LEVEL,current_level);
                 else
                     sLog.outDetail("Unused (> MaxPlayerLevel in mangosd.conf) level %u in `player_classlevelstats` table, ignoring.",current_level);
                 continue;
@@ -2381,8 +2381,8 @@ void ObjectMgr::LoadPlayerInfo()
             uint32 current_level = fields[2].GetUInt32();
             if(current_level > sWorld.getConfig(CONFIG_MAX_PLAYER_LEVEL))
             {
-                if(current_level > 255)                     // hardcoded level maximum
-                    sLog.outErrorDb("Wrong (> 255) level %u in `player_levelstats` table, ignoring.",current_level);
+                if(current_level > STRONG_MAX_LEVEL)        // hardcoded level maximum
+                    sLog.outErrorDb("Wrong (> %u) level %u in `player_levelstats` table, ignoring.",STRONG_MAX_LEVEL,current_level);
                 else
                     sLog.outDetail("Unused (> MaxPlayerLevel in mangosd.conf) level %u in `player_levelstats` table, ignoring.",current_level);
                 continue;
diff --git a/src/game/World.cpp b/src/game/World.cpp
index f66846362..e6623a29a 100644
--- a/src/game/World.cpp
+++ b/src/game/World.cpp
@@ -650,10 +650,11 @@ void World::LoadConfigSettings(bool reload)
     }
     else
         m_configs[CONFIG_MAX_PLAYER_LEVEL] = sConfig.GetIntDefault("MaxPlayerLevel", 60);
-    if(m_configs[CONFIG_MAX_PLAYER_LEVEL] > 255)
+
+    if(m_configs[CONFIG_MAX_PLAYER_LEVEL] > MAX_LEVEL)
     {
-        sLog.outError("MaxPlayerLevel (%i) must be in range 1..255. Set to 255.",m_configs[CONFIG_MAX_PLAYER_LEVEL]);
-        m_configs[CONFIG_MAX_PLAYER_LEVEL] = 255;
+        sLog.outError("MaxPlayerLevel (%i) must be in range 1..%u. Set to %u.",m_configs[CONFIG_MAX_PLAYER_LEVEL],MAX_LEVEL,MAX_LEVEL);
+        m_configs[CONFIG_MAX_PLAYER_LEVEL] = MAX_LEVEL;
     }
 
     m_configs[CONFIG_START_PLAYER_LEVEL] = sConfig.GetIntDefault("StartPlayerLevel", 1);
@@ -756,14 +757,14 @@ void World::LoadConfigSettings(bool reload)
     m_configs[CONFIG_START_GM_LEVEL] = sConfig.GetIntDefault("GM.StartLevel", 1);
     if(m_configs[CONFIG_START_GM_LEVEL] < m_configs[CONFIG_START_PLAYER_LEVEL])
     {
-        sLog.outError("GM.StartLevel (%i) must be in range StartPlayerLevel(%u)..255. Set to %u.",
-            m_configs[CONFIG_START_GM_LEVEL],m_configs[CONFIG_START_PLAYER_LEVEL],m_configs[CONFIG_START_PLAYER_LEVEL]);
+        sLog.outError("GM.StartLevel (%i) must be in range StartPlayerLevel(%u)..%u. Set to %u.",
+            m_configs[CONFIG_START_GM_LEVEL],m_configs[CONFIG_START_PLAYER_LEVEL], MAX_LEVEL, m_configs[CONFIG_START_PLAYER_LEVEL]);
         m_configs[CONFIG_START_GM_LEVEL] = m_configs[CONFIG_START_PLAYER_LEVEL];
     }
-    else if(m_configs[CONFIG_START_GM_LEVEL] > 255)
+    else if(m_configs[CONFIG_START_GM_LEVEL] > MAX_LEVEL)
     {
-        sLog.outError("GM.StartLevel (%i) must be in range 1..255. Set to %u.",m_configs[CONFIG_START_GM_LEVEL],255);
-        m_configs[CONFIG_START_GM_LEVEL] = 255;
+        sLog.outError("GM.StartLevel (%i) must be in range 1..%u. Set to %u.", m_configs[CONFIG_START_GM_LEVEL], MAX_LEVEL, MAX_LEVEL);
+        m_configs[CONFIG_START_GM_LEVEL] = MAX_LEVEL;
     }
 
     m_configs[CONFIG_GROUP_VISIBILITY] = sConfig.GetIntDefault("Visibility.GroupMode",0);
@@ -854,13 +855,13 @@ void World::LoadConfigSettings(bool reload)
 
     m_configs[CONFIG_WORLD_BOSS_LEVEL_DIFF] = sConfig.GetIntDefault("WorldBossLevelDiff",3);
 
-    // note: disable value (-1) will assigned as 0xFFFFFFF, to prevent overflow at calculations limit it to max possible player level (255)
-    m_configs[CONFIG_QUEST_LOW_LEVEL_HIDE_DIFF] = sConfig.GetIntDefault("Quests.LowLevelHideDiff",4);
-    if(m_configs[CONFIG_QUEST_LOW_LEVEL_HIDE_DIFF] > 255)
-        m_configs[CONFIG_QUEST_LOW_LEVEL_HIDE_DIFF] = 255;
-    m_configs[CONFIG_QUEST_HIGH_LEVEL_HIDE_DIFF] = sConfig.GetIntDefault("Quests.HighLevelHideDiff",7);
-    if(m_configs[CONFIG_QUEST_HIGH_LEVEL_HIDE_DIFF] > 255)
-        m_configs[CONFIG_QUEST_HIGH_LEVEL_HIDE_DIFF] = 255;
+    // note: disable value (-1) will assigned as 0xFFFFFFF, to prevent overflow at calculations limit it to max possible player level MAX_LEVEL(100)
+    m_configs[CONFIG_QUEST_LOW_LEVEL_HIDE_DIFF] = sConfig.GetIntDefault("Quests.LowLevelHideDiff", 4);
+    if(m_configs[CONFIG_QUEST_LOW_LEVEL_HIDE_DIFF] > MAX_LEVEL)
+        m_configs[CONFIG_QUEST_LOW_LEVEL_HIDE_DIFF] = MAX_LEVEL;
+    m_configs[CONFIG_QUEST_HIGH_LEVEL_HIDE_DIFF] = sConfig.GetIntDefault("Quests.HighLevelHideDiff", 7);
+    if(m_configs[CONFIG_QUEST_HIGH_LEVEL_HIDE_DIFF] > MAX_LEVEL)
+        m_configs[CONFIG_QUEST_HIGH_LEVEL_HIDE_DIFF] = MAX_LEVEL;
 
     m_configs[CONFIG_DETECT_POS_COLLISION] = sConfig.GetBoolDefault("DetectPosCollision", true);
 
diff --git a/src/shared/Database/DBCEnums.h b/src/shared/Database/DBCEnums.h
index 6ad7fdb12..1d54616a2 100644
--- a/src/shared/Database/DBCEnums.h
+++ b/src/shared/Database/DBCEnums.h
@@ -19,6 +19,14 @@
 #ifndef DBCENUMS_H
 #define DBCENUMS_H
 
+// client supported max level for player/pets/etc. Avoid overflow or client stability affected.
+// also see GT_MAX_LEVEL define
+#define MAX_LEVEL    100
+
+// Server side limitation. Base at used code requirements.
+// also see MAX_LEVEL and GT_MAX_LEVEL define
+#define STRONG_MAX_LEVEL 255
+
 enum AreaTeams
 {
     AREATEAM_NONE  = 0,
diff --git a/src/shared/Database/DBCStructure.h b/src/shared/Database/DBCStructure.h
index 1d32bfd35..acabe18f5 100644
--- a/src/shared/Database/DBCStructure.h
+++ b/src/shared/Database/DBCStructure.h
@@ -267,6 +267,7 @@ struct GemPropertiesEntry
     uint32      color;
 };
 
+// All Gt* DBC store data for 100 levels, some by 100 per class/race
 #define GT_MAX_LEVEL    100
 
 struct GtCombatRatingsEntry