The Sitefinder website is maintained by media regulator Ofcom, following a request from the government in 2000. But mobile firms stopped giving data to the site last year after Ofcom was told it must publish grid references of all the masts in a searchable database.
Ofcom is appealing the order from the Information Commissioner and Tribunal. Sitefinder also shows which type of mobile phone signal is being used, the name of the operator, the frequency of the signal and the height of the mast.
Ofcom was ordered by the Information Commissioner to publish all of that information, including the grid reference of each mast in the country, in a single database file.
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