Isn't that a bit like how many angels can dance on the head of a pin?
And here I thought you said you read the Bible! :o)
Actually, "Hell" doesn't exist just yet. If you remember after the Eden fiasco, God cursed the Devil and said he would crawl on his belly and eat the dust of the Earth. Gen. 3:14
In Luke 10:19, Jesus said Satan, as lightning fell from heaven. We know this goes back to when he first rebelled against God and led 1/3 of the angels with him. So he was cast onto the Earth. Rev. 12:9 also reiterates this.
In Job 1:7, Satan is said to be going to and fro on the Earth and walking up and down it. We know from many other Scriptures that Satan and his demons (fallen angels) are present in a spiritual realm on Earth and tempt people and sometimes, possess them. Christians are warned to be wary of his wiles.
In Jude 1:6, there are fallen angels who did not "keep their first estate" and they are in everlasting chains under darkness reserved until the great judgment.
Then after the tribulation and when Jesus rules for 1000 years on Earth, Satan is "bound" (Rev. 20:2) someplace, probably the same place the ones who are bound in chains are (Hades/Sheol). The "Beast" and the "False Prophet" have been cast into what sounds like Hell and it is at that time that I believe the actual final Hell is actually created. At the end of the millenial reign, Satan is "loosed" and he tries to start the war all over again (Rev. 20:7). This time, he doesn't get far, Rev. 20:10 says he is finally cast into Hell. His demised is spoken about:
Rev.20:7-10
When the thousand years are over, Satan will be released from his prison and will go out to deceive the nations in the four corners of the earth—Gog and Magog—and to gather them for battle. In number they are like the sand on the seashore. They marched across the breadth of the earth and surrounded the camp of God’s people, the city he loves. But fire came down from heaven and devoured them. And the devil, who deceived them, was thrown into the lake of burning sulfur, where the beast and the false prophet had been thrown. They will be tormented day and night for ever and ever.