The appointment allows ads to be sold across both networks, which are owned by different clients, for the first time.
The combined estate offers more than 3,700 screens in 570 high-end hair and beauty salons throughout the UK and reaches more than 360,000 mainly female adults with 1.26 million impacts across the same time period.
Tom Goddard, executive chairman of Digicom, said: "Together they provide a unique opportunity for national brands to reach a highly desirable audience, traditionally one that is very hard to reach."
Toni & Guy TV is run by Fitzgerald Shurey Tarbuck and Simply Salon TV is run by Simply Media Salon TV.
This article was first published on Media Week