Gen 1, Gen 2, and Gen 3 Bees Endurance stat determines which Zone it can reach. See the chart below for details. 

Genesis Bees can reach all 8 Zones in Universe one.

Gen Z Bees reach is determined by the player's XP level. See the chart below for details.

Landowners can send their Genesis, Gen 1, Gen 2, and Gen 3 Bees to their own Lands regardless of the Bee's Endurance stat.

EXCEPTION: Landowners must have Beemium to Hunt their Extreme Lands.