What countries are restricted by Poloniex?

Could you please inform me which countries are restricted from using Poloniex's services?" I am interested in exploring the cryptocurrency market and considering using Poloniex as my trading platform. However, before making any decisions, I would like to ensure that I am not residing in a country that is restricted from accessing this platform. Could you provide me with a list of these restricted countries? It would be greatly appreciated if you could also provide any additional information regarding the reasons for these restrictions. Thank you for your time and assistance.