TT #66 · Parashas Noach · Sixth Aliyah · Passuk 10:10
The beginning of his kingdom was Babel, Erech, Akkad, and Calneh, in the land of Shinar.
Torah Temimah points to the identifications in Yoma 10a.
E-Daf image — Yoma 10a (size=3)
English: Babel is as its plain meaning; Erech is Urikut; Akkad is Bashkar; Calneh is Nofar-Ninfe.
Custom (geographic identifications).
The cities of Nimrod’s kingdom are identified with known Mesopotamian sites in the rabbinic tradition.