Hosea's ministry spanned the reigns of four Judean kings (Uzziah, Jotham, Ahaz, and Hezekiah; cf. Isa. 1:1) and one Israelite king (Jeroboam II; 1:1). King Uzziah (Azariah) of Judah began reigning in 792 B.C., and King Hezekiah of Judah stopped reigning in 686 B.C., spanning a period of 107 years. Probably Hosea's ministry began near the end of Jeroboam II's (793-753 B.C.) and Uzziah's (792-740 B.C.) reigns and ended in the early years of Hezekiah's reign (715-686 B.C.). This would mean that the prophet's ministry lasted perhaps 45 years (ca. 760-715 B.C.).3It also means that Hosea's ministry extended beyond the fall of Samaria in 722 B.C. since Hezekiah began ruling in 715 B.C. Hosea did not date any of his prophecies.
There were six other kings of Israel who followed Jeroboam II that Hosea did not mention in 1:1 that ruled during the reigns of the four Judean kings he named. They were Zechariah (753 B.C.), Shallum (752 B.C.), Menahem (752-742 B.C.), Pekah (752-732 B.C.), Pekahiah (742-740 B.C.), and Hoshea (732-723 B.C.). Hosea evidently prophesied during the reigns of more kings of Israel and Judah than any other prophet, probably eleven. It seems unusual that Hosea would mention four Judean kings and only one Israelite king, especially since he ministered primarily to the Northern Kingdom. He may have done this because the six Israelite kings named above were less significant in Israel's history than the other kings Hosea did mention. Another possibility is that Hosea did this because he regarded the Judean kings as Israel's legitimate kings in contrast to those of the North. He may have mentioned Jeroboam II because he was the primary king of the Northern Kingdom during his ministry or because he was the strongest king of that kingdom during that period.
