A namber is part name and part number. Each number between 0 and 255 has a namber. For example, 1 is fun and 213 is star.
From their site:
67.171.37.87 [the current address of this host] is duck.pig.cat.food.mysteryrobot.com
It’s a little more memorable, I guess.
via http://earth.frog.brown.tooth.mysteryrobot.com/
<updated in the wake of a network issue> now this site can be called bone.bike.wind.bag.