Base was founded as Belgium's third major mobile network operator in 1999 under the brand name of KPN Orange.

It was a joint venture between the Dutch KPN Mobile and the then British Orange telcos.

After the acquisition of Orange by France Télécom, its shares were sold to KPN Mobile.

In October 2009 the fixed line and broadband ADSL operations were rebranded from Tele2 to Base.

[4] Base has an estimated 98% coverage of the country and 26% market share in mobile communications.