The vision concerning Judah and Jerusalem that Isaiah son of Amoz saw during the reigns of Uzziah, Jotham, Ahaz and Hezekiah, kings of Judah. (Isaiah 1:1 NIV)
Comment: Uzziah reigned in the kingdom of Judah from about 792-742 BC. He was a “good” king. He had a skilled army and conquered many of his local enemies, such as the Philistines and the Ammonites (2 Chronicles 26). His son Jotham was also a “good” king. He reigned from about 751-735 BC. He fought in a war against the Israelites and Syrians, and also defeated the Ammonites. Ahaz ruled from from about 735-715 BC. He was a bad king. His kingdom was defeated, but not overthrown, by the Syrians and Israelites. The city of Elath was captured by Syria, and taken by the Edomites when Syria fell. Both the Edomites and the Philistines harassed him. During his reign both Syria and Israel were overthrown by the Assyrian Kings Tiglath Pileser and Sargon. Next was King Hezekiah who reign from about 715-686 BC. He was a good king. He withstood a siege by Sennacherib king of Assyria in about 701 B.C.
All in all, Isaiah may have prophesied over a 60-year span from the 740s into the 680s. Bible-believing scholars disagree on when this particular prophecy of Isaiah chapter one was delivered.