Nearly three million households in the UK currently don't have broadband access of 2Mbps or above, says the BBC.
Research conducted by broadband website SamKnows on behalf of the broadcaster also revealed that many of these households are not located in rural areas.
In the initial findings of its Digital Britain report, which were released in January, the government revealed plans to ensure every household has access to 2Mbps broadband by 2012.
However, the number of broadband 'notspots' means the government faces a huge task in achieving that goal.
"We had assumed that these notspots were in remote parts of the countryside. That may be where the most vocal campaigners are but there is a high incident of them in commuter belts," Alex Salter from SamKnows told the BBC.
"It prevents flexible working. If the problem is fixed it means a lot more people could work from home which offers a very real way to improve society," added Salter.
However, the broadband website said that less than one percent of UK households couldn't get any form of broadband access.
The full findings of the Digital Britain report are expected next month.