NET

6 You also know that the angels who did not keep within their proper domain but abandoned their own place of residence, he has kept in eternal chains in utter darkness, locked up for the judgment of the great Day.

Darby

6 And angels who had not kept their own original state, but had abandoned their own dwelling, he keeps^D9424 in eternal chains under gloomy darkness, to [the] judgment of [the] great day;

Darby Bible Notes

keeps - The Greek perfect tense; signifying here the continuance of what had begun in the past.

KJV

6 And the angels which kept not their first estate^K7296, but left their own habitation, he hath reserved in everlasting chains under darkness unto the judgment of the great day.

KJV Bible Notes

first estate: Or, principality.

Strong's

6 And ^G5037 the angels^G32 which kept^G5083 not^G3361 their^G1438 first estate^G746, but^G235 left^G620 their own^G2398 habitation^G3613, he hath reserved^G5083 in everlasting^G126 chains^G1199 under^G5259 darkness^G2217 unto^G1519 the judgment^G2920 of the great^G3173 day^G2250.