011 is the US dialing code for international calling the 1 represents the country code for the US In Europe (and many countries of Latin America) you generally dial 00 for international then 1 for US then the Area code and number (NPA/NXX). So to call an 800/888/877/866 number from most EU locals.. Dial 00 1 8XX-XXX-XXXX . As discussed you will be advised that the number is not toll free outside of the US but the call should go through fine. Cool little site to give you dialing instructions for calling from and to various countreis.

http://www.countrycallingcodes.com/