TDC Holding A/S or TDC Group (formerly Tele Danmark Communications) is a Danish telecommunications company dating back to 1879. TDC Group is the largest telecommunications company in Denmark. The company's headquarters are located in Copenhagen. TDC Holding is the holding company of two separate companies which were spun-off from TDC; Nuuday A/S and TDC NET A/S. All consumer related services and brands were placed under Nuuday, and the ownership and maintenance of physical infrastructure of mobile antennas as well as coax and fibre optical lines were placed under TDC NET. History In 1879, Kjøbenhavns By- og Hustelegraf was established by telegraph engineer Severin Lauritzen and telegraphist Th. Thaulow. The company set up private telephone lines over shorter distances, for example between offices and factories. In addition, it offered telegraph service in Copenhagen using small telegraph stations around the city that could communicate by telephone. On 21 August 1882, Carl Frederik Tietgen acquired the Copenhagen division of International Bell Telephone Company, an American-owned telephone exchange on Lille Kongensgade in Copenhagen, for DKK 200,000 and founded Kjøbenhavns Telefon Aktieselskab (KTS), later Kjøbenhavns Telefon Aktieselskab (KTAS). In 1927, the Post- og Telegrafvæsenet (P&T; lit. the Postal and Telegraph Service) was created as Denmark's government-run postal, telegraph and telephone service, from a merger of the Danish Post Office and the Danish Telegraph Service. Reforms to the P&T from 1986 lead to it being split into one Directorate-General and six state-owned enterprises. In November 1990, the Folketing passed a law that paved the way for a nationwide Danish telecom, spun out from the P&T. The company was named Tele Danmark and was the parent company for the existing regional companies (KTAS, Jydsk Telefon, Tele Sønderjylland, Fyns Telefon, and Rigstelefonen). In 1995, the regional companies were merged into Tele Danmark, and the first nationwide cable TV company, Tele Danmark Kabel TV was created. Five years later, in 2000, Tele Danmark changed its name to TDC. In January 2000, TDC got a new logo with five ovals in red, yellow, green, turquoise and blue colour. In December 2000 Tele Danmark changed its name to TDC. At the same time it demerged into a parent holding company and a number of subsidiaries with the purpose of increasing customer focus, creating greater transparency and achieving faster time to market for products and services. Over the past decade, TDC developed from a traditional and mainly Danish provider of landline and