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List below
Go to www.answers.com/topic/icann
There is a partial list at the related site below.
(See the related links.)
There are several websites that one can find the country codes for calling international numbers.
http://LincMad.com/countrycodes.html
Countries do not have bar codes. They may have calling codes, or postal codes, internationally recognised.
Bar codes are usually for items on retail sale.