Britain's worst street for broadband is Cromarty Road in Stamford, Lincolnshire - with a 0.132mbps speed so slow it would take 25 hours to download a film.
The results of a nationwide survey pinpointed the road as the worst in the UK - with a connection 500 times slower than the fastest, Willowfield in Telford.
The results come from 2,261,336 speed tests conducted by uSwitch.com's speedchecker.
The survey has highlighted entire counties that are blackspots for broadband speed.
Lincolnshire has three of the top 10 slowest streets for broadband in the country.
Speeds in Lincolnshire are 37 times slower than the national average of 9mbps.
Essex has four of the slowest streets in the UK, but also boasts the third fastest - Cromwell Road in Southend-on-Sea.
Second-slowest in the country, though is Ledbury Road in Wellington Heath, Herefordshire, with an average download speed of just 0.192Mbps end.
Third slowest is Halsey Drive in Edzell, Aberdeenshire where speeds of 0.25Mbps are so slow that simply downloading one song would take 2 minutes 40 seconds.
Even London streets aren’t all in the fast lane - South View Road in the London Borough of Haringey has an average speed of just 0.639Mbps.
Julia Stent, broadband expert at uSwitch.com, says: “The massive discrepancy between the fastest and slowest streets in Britain shows what the Government is up against in its fight to drag Britain into the broadband fast-lane.
"These results show just how ambitious it is being in its bid to overtake the rest of Europe and haul Britain in line with the likes of South Korea and Singapore by bringing super-fast broadband to 90% of the UK. Rural parts of Britain in particular are still experiencing broadband speeds so slow that they might as well have no broadband at all.
“But worryingly, the Government’s super-fast broadband rollout is heavily geared towards urban areas, which will only widen the rural-urban broadband gap.
"It’s concerning that the main aim isn’t providing a decent broadband service to those areas still lacking basic broadband infrastructure and bringing acceptable average speeds to those in rural areas who have been forever languishing in the slow lane.
"While the Government also has ambitions of bringing basic broadband to all – this only means speeds of 2Mbps, and no targets have been set.