Turkcell Superonline is "#1 Alternative Telecommunications operator" and "Fastest Growing ICT Company for the last 3 years" (according to the latest ICT500/Turkey listing published July 2010 ) . 

The company is the only FTTH/B operator in Turkey offering ultrawide broadband services such as "up to 1000 Mbps internet access to residential customers" and "10+ Gbps internet access to enterprises" through its own nation-wide alternative fiber network. The company also provides xDSL, datacenter co-location, hosting, security, virtual private networks, P2P fiber access, cloud, back-up services. The company has its own international fiber access to all neighbouring countries and many peerings with the global operators. The company continues investments on fiber roll-out, FTTx, bitstream acces, local loop unbundling, MPLS network and NGN. The company operates as a 100% owned subsdiary of Turkcell. 

History: Bilisim Telekom was founded in 2004 as and changed its name to Tellcom in 2005. In 2008, Tellcom bought the infrastructure and services of Sabanci Telekom. After completion of the merge phase with Superonline in 2009, company changed its brand as Superonline but remaining legal company name as it is. The company used Superonline brand untill May 2011 when Turkcell Superonline brand is started to be used.