There is conjecture among those interested in prophecy, that the final Antichrist is Satan himself. Most would be aware that the Antichrist has a few aliases. "Man of sin" (2 Thess. 2:3); "little horn" (Daniel 7:24,25); the second phase of the little horn of (Daniel 8:10); King of the North (Daniel 11:40-45); the sea beast (Revel. 13:1-10).
However, apart from the scriptures that actually identify the Antichrist as above, there is one in particular that straight out denies the possibility of the Antichrist being Satan. That is
KJV Revelation 16:13
13 And I saw three unclean spirits like frogs come out of the mouth of the dragon, and out of the mouth of the beast, and out of the mouth of the false prophet.
The Dragon and the beast cannot be the same entity.
Satan, right up to the point when he in desperation impersonates Christ Himself to all the world, uses agents. Satan in prophecy is the dragon. (Revel.12:9; 20:2; and elsewhere throughout Revelation, where his agents on the earth reflect the attributes and appearance of the dragon. Prime example: Revelation 12 describes the dragon standing before the woman to devour her child. The literal fulfillment was Herod attempting to destroy Jesus. How was that representative of the dragon? Herod was a Roman puppet. He was pagan Rome's representative and agent of Satan to destroy the Messiah.
Note and compare the following...
KJV Daniel 7:7, 19-20, 23-24
7 After this I saw in the night visions, and behold a fourth beast, dreadful and terrible, and strong exceedingly; and it had great iron teeth: it devoured and brake in pieces, and stamped the residue with the feet of it: and it was diverse from all the beasts that were before it; and it had ten horns....
19 Then I would know the truth of the fourth beast, which was diverse from all the others, exceeding dreadful, whose teeth were of iron, and his nails of brass; which devoured, brake in pieces, and stamped the residue with his feet;
20 And of the ten horns that were in his head, and of the other which came up, and before whom three fell; even of that horn that had eyes, and a mouth that spake very great things, whose look was more stout than his fellows....
23 Thus he said, The fourth beast shall be the fourth kingdom upon earth, which shall be diverse from all kingdoms, and shall devour the whole earth, and shall tread it down, and break it in pieces,
24 And the ten horns out of this kingdom are ten kings that shall arise: and another shall rise after them; and he shall be diverse from the first, and he shall subdue three kings.
Compare with...
KJV Revelation 12:3-4, 13, 16-17
3 And there appeared another wonder in heaven; and behold a great red dragon, having seven heads and ten horns, and seven crowns upon his heads.
4 And his tail drew the third part of the stars of heaven, and did cast them to the earth: and the dragon stood before the woman which was ready to be delivered, for to devour her child as soon as it was born....
13 And when the dragon saw that he was cast unto the earth, he persecuted the woman which brought forth the man child....
16 And the earth helped the woman, and the earth opened her mouth, and swallowed up the flood which the dragon cast out of his mouth.
17 And the dragon was wroth with the woman, and went to make war with the remnant of her seed, which keep the commandments of God, and have the testimony of Jesus Christ.
And...
KJV Revelation 13:1-8
1 And I stood upon the sand of the sea, and saw a beast rise up out of the sea, having seven heads and ten horns, and upon his horns ten crowns, and upon his heads the name of blasphemy.
2 And the beast which I saw was like unto a leopard, and his feet were as the feet of a bear, and his mouth as the mouth of a lion: and the dragon gave him his power, and his seat, and great authority.
3 And I saw one of his heads as it were wounded to death; and his deadly wound was healed: and all the world wondered after the beast.
4 And they worshipped the dragon which gave power unto the beast: and they worshipped the beast, saying, Who is like unto the beast? who is able to make war with him?
5 And there was given unto him a mouth speaking great things and blasphemies; and power was given unto him to continue forty and two months.
6 And he opened his mouth in blasphemy against God, to blaspheme his name, and his tabernacle, and them that dwell in heaven.
7 And it was given unto him to make war with the saints, and to overcome them: and power was given him over all kindreds, and tongues, and nations.
8 And all that dwell upon the earth shall worship him, whose names are not written in the book of life of the Lamb slain from the foundation of the world.
The similarities resolve all doubt. The Dragon cannot be the little horn, or the beast. But they are most certainly created after his own image. These persecuting, murderous, lying, destructive enemies of Christ and His people, owe their power, their authority, their throne, their very being, to the dragon, Satan, who created them for the very purpose of destroying God's people in order to hurt the one he truly despises, Jesus Christ.