The list given below includes voltage Level used in different countries. At present the list includes
Argentina, Australia, Austria, Brazil, Canada, China, Denmark, France, Germany, India, Ireland, Israel, Italy, Japan, New Zealand, Norway, Pakistan, Philippines, Russia, Saudi Arabia, South Africa, Spain, Sweden, Thailand, Turkey, UK, USA.
Generally, the voltages used are 120, 100, 220, 230 and frequency employed is 50, 60 Hz.
Find out this amazing video which compares 50 Hz and 60 Hz frequency.