Victoria had the lion's share of complaints, with 2029 areas deemed to be mobile blackspots after a public nomination process.
Today's news is part of the federal government’s $100 million pre-election initiative to improve inadequate mobile coverage in outer metropolitan, regional and remote Australia.
Victoria is particularly close to a state election and its Premier Denis Napthine has been particularly vocal on the issue, announcing $40 million in state government funding for blackspots earlier this year.
NSW was in second place with a total of 1780 nominations, while QLD had 897 and WA 52.
South Australia nominated 468 locations, Tasmania 262 and the Northern Territory nominated 25.
The Government accepted nominations for mobile black spot locations between December 2013 and 1 August 2014, and the 6000 nominations in the government's database will compete for either new or enhanced mobile base stations under the program.
The government's Parliamentary Secretary for Communications Paul Fletcher said a competitive selection process is on the way, with successful locationsto be announced early next year.
"The competitive selection process is designed to allocate the funding to locations which will deliver the greatest benefit in terms of new coverage, for the public funding provided," Fletcher said in a statement.
Between 250 and 300 new mobile phone towers will be built with co-investment from telephone companies, state governments and local council, though one base station could cover multiple blackspots in some instances.
"It is important to understand that, although 6,000 locations have been nominated, this does not mean that there are 6,000 locations where a new base station is required," he said.
"Initial analysis suggests that in many cases the nominated locations are within a few kilometres of another nominated location."