TalkTalk has taken over Tesco's broadband and fixed-line service, along with the retail group's content streaming platform blinkbox.
A cash sum has been paid for the businesses, which have been sold as Tesco looks to refocus on its core areas of expertise.
The acquisition of Tesco broadband delivers another 75,000 broadband and 20,000 voice customers to TalkTalk, which recently snapped up Virgin Media National's subscriber base.
Tesco's broadband and phone customers will be transferred across to the TalkTalk network over the coming months.
"The purchase of Tesco’s broadband base is another example of TalkTalk leveraging its national network to grow faster," claimed Dido Harding, Chief Executive at TalkTalk.
"We are excited about the future of quad-play - fixed phone and broadband, TV and mobile - and this acquisition will help to further drive home our value for money advantage."
Meanwhile, the deal for on-demand streaming provider blinkbox - which works across multiple platforms and devices, both inside and outside the home - had been rumoured for some weeks.
TalkTalk claimed that blinkbox’s "established technical expertise" and "incremental content relationships" are "highly complementary" to its strategy of providing value-for money communication services.
"TalkTalk TV is already the fastest growing TV platform in the UK with over 1.2 million customers," the firm stated.
It added that blinkbox will help accelerate the development of this platform by delivering "a number of key initiatives significantly faster", such as offering a TV app to customers for in- and out-of-home access to paid-for content across a range of devices.
According to TalkTalk, the integration of blinkbox with TalkTalk's existing television business will begin immediately.
In the wake of the takeover, blinkbox Chief Executive Adrian Letts is to join TalkTalk as the new Managing Director for TV.
Dido Harding said the company is "excited" about the opportunities that blinkbox’s platform and technology expertise bring to the fim.
The TalkTalk CEO claimed it will "significantly accelerate" the development of TalkTalk TV.