Country ccTlds that are used globally or for different areas.

Some country TLDs (ccTld) have been used for different purposes.

.ac Ascension Island,Global http://www.nic.ac/ Targetted at Academic Institions

.ad Andorra,Global http://domai.nr/ Ad agencies

.at Austria,Global http://www.nic.at/en/domainsuche/faq_domain_registration/

.cc Cocos (Keeling) Islands, Global http://pc.net/helpcenter/answers/dot_cc_domains

.co Colombia,Global http://www.cointernet.co/

.cx Christmas Island,Global

.im Isle of Man,Global

.io British Indian Ocean Territory,Global http://www.nic.io/

.it Italy,Global http://we.register.it/domains/free_it.html?chglng=eng

.la

.ly Libya,Global

.me Montenegro,Global

.ms

.sc http://www.name.com/domains/sc

.to Tonga http://www.tonic.to/

If you do use one of these domains extensions then don't forget to target this in Google's Webmaster tools.