CIA
CIA (Central Investigation Agency) is national intelligence agency of United States and founded in 1947. CIA headquarter is located in Fairfax, Virgina.
MI6
MI6 is national intelligence agency of United Kingdom and was founded in 1909. MI6 headquarter is located in London.
ISI
ISI (Inter Services Intelligence) is Pakistani intelligence agency founded in 1948. ISI headquarter is located in Islamabad.
RAW
RAW is Indian intelligence agency founded in 1968. RAW headquarter is located in New Delhi.