is the range at which a Hero
may use his or her basic attack ability on another unit. There are two main subdivisions of attack range: melee and ranged Heroes. Attack range can be extended by certain abilities
 Melee and Ranged
Melee Heroes usually have an attack range of 128 units. The attack range of a Hero has no actual basis on whether that hero is ranged or not, instead it depends on the hero's missile speed (melee heroes always having "instant" missile speed while ranged heroes having specific missile speeds). Ex. the ranged hero Templar Assassin notably has a base attack range of 140 shorter than that of the melee Doom which is 150. A Hero's melee or ranged designation dictates how they interact with certain game mechanics. Dragon Knight, Lone Druid, Troll Warlord, and Terrorblade are the only heroes who can alter their melee-ranged distinction.
Melee Heroes receive greater benefit from certain items, such as Stout Shield or Quelling Blade. Melee Heroes benefit exclusively from Cleave and some Lifesteal Auras, while ranged Heroes benefit exclusively from other auras, such as Precision Aura.
Ranged Heroes also fire a projectile when they attack, the speed/missile speed of which can affect how long an attack takes to damage a unit. Attack projectiles can be dodged/disjointed by most Blink abilities. Melee unit attacks deal their damage instantly and cannot be dodged in this way.
Ranged Heroes also have a 25% chance to miss any unit they attack when firing uphill. Melee heroes do not have a chance to miss, even though some melee heroes can attack up cliffs.
 Attack Range Comparison
| Abaddon, Abyssal Underlord, Alchemist, Anti-Mage, Axe, Beastmaster, Bloodseeker, Bounty Hunter, Brewmaster, Bristleback, Broodmother, Centaur Warrunner, Chaos Knight, Clockwerk, Dark Seer, Dragon Knight*, Earth Spirit, Earthshaker, Elder Titan, Ember Spirit, Faceless Void, Juggernaut, Kunkka, Legion Commander, Lifestealer, Lycan, Magnus, Meepo, Naga Siren, Night Stalker, Nyx Assassin, Ogre Magi, Omniknight, Phantom Assassin, Phantom Lancer, Pudge, Riki, Sand King, Slardar, Slark, Spectre, Spirit Breaker, Sven, Terrorblade*, Tidehunter, Timbersaw, Tiny*, Treant Protector, Tusk, Undying, Ursa, Wraith King
| Templar Assassin*
| Luna, Morphling
| Bane, Huskar, Jakiro, Vengeful Spirit
| Weaver, Winter Wyvern*
| Outworld Devourer, Venomancer
| Storm Spirit
| Dazzle, Enigma, Phoenix, Shadow Demon, Shadow Fiend, Shadow Shaman, Tinker, Troll Warlord*
| Enchantress*, Lich, Lone Druid*, Necrophos, Puck, Queen of Pain, Sniper*
| Io, Viper
| Ancient Apparition, Chen, Clinkz, Crystal Maiden, Death Prophet, Disruptor, Invoker, Keeper of the Light, Leshrac, Lion, Medusa, Mirana, Nature's Prophet, Pugna, Rubick, Silencer, Skywrath Mage, Visage, Warlock, Windranger, Witch Doctor
| Arc Warden, Drow Ranger
*Attack range can be modified by abilities; see below
 Abilities that modify attack range