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28 different chronological periods, also depending on geographical contexts, are considered in CDLI for dating cuneiform documents. These are:

Period	Chronological Range	CDLI texts and documents
Pre-Writing	ca. 8500-3500 BC	CDLI entries dated to that period
Uruk V	ca. 3500-3350 BC	CDLI entries dated to that period
Uruk IV	ca. 3350-3200 BC	CDLI entries dated to that period
Uruk III	ca. 3200-3000 BC	CDLI entries dated to that period
Proto-Elamite	ca. 3100-2900 BC	CDLI entries dated to that period
Early Dynastic I-II	ca. 2900-2700 BC	CDLI entries dated to that period
Early Dynastic IIIa	ca. 2700-2500 BC	CDLI entries dated to that period
Early Dynastic IIIb	ca. 2500-2340 BC	CDLI entries dated to that period
Ebla	ca. 2350-2250 BC	CDLI entries dated to that period
Old Akkadian	ca. 2340-2200 BC	CDLI entries dated to that period
Linear Elamite	ca. 2200 BC	CDLI entries dated to that period
Lagash II	ca. 2200-2100 BC	CDLI entries dated to that period
Harappan	ca. 2200-1900 BC	CDLI entries dated to that period
Ur III	ca. 2100-2000 BC	CDLI entries dated to that period
Early Old Babylonian	ca. 2000-1900 BC	CDLI entries dated to that period
Old Assyrian	ca. 1970-1700 BC	CDLI entries dated to that period
Old Babylonian	ca. 1900-1600 BC	CDLI entries dated to that period
Middle Hittite	ca. 1500-1100 BC	CDLI entries dated to that period
Middle Babylonian	ca. 1400-1100 BC	CDLI entries dated to that period
Middle Assyrian	ca. 1400-1000 BC	CDLI entries dated to that period
Middle Elamite	ca. 1300-1100 BC	CDLI entries dated to that period
Neo-Assyrian	911-612 BC	CDLI entries dated to that period
Neo-Elamite	770-539 BC	CDLI entries dated to that period
Neo-Babylonian	626-539 BC	CDLI entries dated to that period
Achaemenid	547-331 BC	CDLI entries dated to that period
Hellenistic	323-63 BC	CDLI entries dated to that period
Parthian	247 BC - 224 AD	CDLI entries dated to that period
Sassanian	224-641 AD	CDLI entries dated to that period