Proximus (formerly known as Belgacom Mobile) is the largest of Belgium's three mobile telecommunications companies and is a part of Proximus Group (previously Belgacom Group).

Proximus was founded in 1994 as a joint venture between Belgacom, 75%, and AirTouch, 25%, respectively.

It was originally a de facto monopoly, but after deregulation Mobistar (now Orange Belgium), a second GSM 900 operator soon joined the game in 1998, followed by BASE – then known as KPN-Orange UK – in 1999.

[2] Proximus mobile was a subsidiary of Belgacom, which had an IPO in 2004 but remains more than 50% state owned.

In 2014, Belgacom was rebranded to Proximus, under the leadership of Dominique Leroy.