NK.pl, formerly Nasza-klasa.pl (English: Our-class.pl), was a Polish school-based social networking service used by alumni and students. NK.pl was owned and administered by Ringier Axel Springer Polska. NK.pl was launched on 11 November 2006 by Maciej Popowicz, Paweł Olchawa, Michał Bartoszkiewicz, and Łukasz Adziński, four college students studying computer science at the University of Wrocław. The company was headquartered in Wrocław, Poland, and its name came from the song "Nasza Klasa" by Jacek Kaczmarski. More information...
According to PR-model, nk.pl is ranked 71,673rd in multilingual Wikipedia, in particular this website is ranked 1,670th in Polish Wikipedia.
The website is placed before history-library.com and after 24coaches.com in the BestRef global ranking of the most important sources of Wikipedia.