Tiscali has boosted its number of broadband subscribers to 1.5 million in the first half of the year.
The Italian telecommunications firm had previously just 1.48 million users at the end of the first quarter.
However, factoring in Tiscali's inherting rival provider Pipex's estimated customer base of around 570,000, its subscriber base is expected to stand at between 1.9 and 2.1 million once its acquisition is fully integrated. This would represent a 15 per cent share of the UK market.
The firm also announced that it has undbundled 800 telephone exchanges, which cover 55 per cent of UK households.
Meanwhile, the firm's base of dial-up customers stands at around 330,000.
News of the Tiscali's growing customer base came as the firm announced its quarterly profits, which showed a significant turnaround in fortunes.
During the first half of 2007, the firm turned a profit of £15.4 million, compared with a loss of £51.6 million for the same period last year.