Are the fallen angels already in hell?

Aquinas argues that angels achieve their end by a single meritorious act. They either choose God, thereby possessing the Beatific Vision, or the reject him and fails permanently to achieve the end they were created for (Beatific Vision). So, if the demons (fallen angels) have chosen to go against God and since they cannot "change their mind" due to how the angelic nature operates, aren't they already in hell (i.e. lost the Beatific Vision forever) and aren't they already suffering the pangs of hell? But, I found some verses from Scripture that seems to suggest the fallen angels are still awaiting their end (hell) until Final Judgement: > And the angels who did not keep their positions of authority but > abandoned their proper dwelling—these he has kept in darkness, bound > with everlasting chains for judgment on the great Day. (Jude 1:6) > > For if God did not spare the angels when they sinned, but cast them to > pits of nether gloom to be kept until judgment. (2 Peter 2:4) So, are the demons already in hell suffering its pangs? How do we understand the quotations from Scripture? I would appreciate answers that are consistent with the Catholic teaching.