Generally, you can use your TransferWise card wherever MasterCard is accepted. If you see the MasterCard logo, you’re good to go.
However, there are a few countries where your card won't work at the moment:
Afghanistan, Burma (Myanmar), Cuba, Eritrea, Iran, Iraq, Ivory Coast, Laos, Liberia, Libya, Nauru, North Korea, Palestinian Territories, Somalia, Syria, Yemen, Burundi, Central African Republic, Chad, Congo and the DR of Congo, Sudan and South Sudan.
You can use your TransferWise card to make online payments, too. However, it won't work with websites that require 3DS. We're working on fixing this.