Cetin, founded in 2015 and headquartered in the Czech Republic, is a wholesale telecommunications infrastructure provider operating in Central and Eastern Europe. Employing approximately 2000 people, the company offers both active and passive infrastructure services. Cetin resulted from the separation of infrastructure assets from O2 Czech Republic and three Telenor-branded operators in the region, and comprises four operating companies located in the Czech Republic, Bulgaria, Hungary, and Serbia.