South African IT firm Dimension Data is looking at potential acquisitions in the United States, where it aims to more than treble revenue to $2.5 billion within five years, chief executive Brett Dawson said on Wednesday.

A unit of Japan's Nippon Telegraph and Telephone Corp , Dimension Data bought California-based cloud computing firm OpSource two years ago.

"Specifically in the US we have ambitions to go from about $800 million to about $2.5 billion through a plan which encompasses organic growth and (to) continue to fill out our competence... through targeted acquisitions," Dawson told a news conference.

He did not say how much the company was looking to spend on acquisitions.

Earlier this year, Dimension Data made a Ksh3 billion (R326.4 million) offer to acquire AccessKenya.

Dimension Data said that to buy the firm, it is offering Ksh14.00 (R1.50) per share, a premium of 42%.