2Pe 2:4 For if God spared not the angels that sinned, but cast them down to hell, and delivered them into chains of darkness, to be reserved unto judgment;
Jud 1:6 And the angels which kept not their first estate, but left their own habitation, he hath reserved in everlasting chains under darkness unto the judgment of the great day.
The fallen Angels are bound until Tribulation.
Devils are the spirits of the nephelim that died in the flood, since they have no souls they wander the earth