Which eons are included in Precambrian time?

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A detailed geologic time scale chart displaying Earth's history from the Hadean Eon over 4.5 billion years ago to the present, organized by eons, eras, periods, epochs, and ages with color-coded columns and corresponding dates in millions of years. — Precambrian The stratigraphic chart of geologic time.

Precambrian time is divided into three eons:

Hadean Eon: An informal interval spanning from approximately 4.6 billion to 4 billion years ago, characterized by the initial formation of Earth.12
Archean Eon: A formal geologic interval occurring between roughly 4 billion and 2.5 billion years ago.13
Proterozoic Eon: A formal geologic interval extending from 2.5 billion to 541 million years ago.134

Together, these eons encompass more than 80 percent of the total geologic record, extending from the formation of Earth until the beginning of the Cambrian Period.1