Virgin Media reached a total of 4,969,700 broadband subscribers in the UK and Ireland at the end of Q1 2015, as more households signed up for cable services.
This comprises of 4,929,500 cable broadband subscribers and another 40,200 who remain on the ADSL Virgin National network, which has been sold to TalkTalk.
In previous quarters, Virgin Media's parent company Liberty Global published separate figures for its UK and Ireland businesses.
However from Q1 2015, the US telecoms giant has combined the Virgin Media UK subscriber figures with those of UPC Ireland - another Liberty Global cable operator.
In Q4 2014, Virgin Media had 4,625,800 broadband subscribers in the UK. Subscriber growth - along with the reporting change - has seen the service provider increase this total by 343,900.
Earlier this year, the broadband provider announced plans to invest £3 billion extending its cable network to other parts of the UK.
The company aims to pass another four million UK properties through its Project Lightning initiative by 2020.
This will mean a total of 17 million households will have access to Virgin Media services by the end of the decade.