It is unclear what is meant by "dominations".

If the question intends to ask about "denominations", Islam does not use that term. It has sects (Sunni, Shiite, Ibadi, Kharijite, Ahmadi, etc.) and within those sects, it has schools. For example, the four main Sunni schools are: Maliki, Hanafi, Hanbali, and Shafi'i and the four main Shiite schools are: Ja'afari, Zaydi, Ismaili, and Elevener.

If the question intends to ask about "dominions", Islam extends from the Middle East, over North Africa, includes much of West Africa and significant portions of East Africa and the Horn of Africa, portions of the Indian Subcontinent, and Indonesia.