NBN Co has released figures indicating about 34,500 homes and businesses are using the NBN, up from 13,600 in June last year.
The figures include fibre, fixed-wireless and satellite services.
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Out of this, 10,400 were connected via fibre in both built-up areas 'brownfields' and new developments 'greenfields'. The number of active greenfields premises increased from 500 in June to 3800 in December 2012.
Fibre has now passed 46,100 premises in Brownfield areas and 26,300 lots/premises in greenfield estates.
NBN Co's corporate plan has set a target of 286,000 brownfields premises passed and 44,000 brownfields premises activated by the end of June.
"The results reflect progress in the early stages of the rollout, and are what we would expect given the time and work necessary to put in place the contracts and agreements needed to get to this point of execution," NBN Co, Mike Quigley, said in a statement. "We are targeting to pass more premises in the final quarter of the financial year than we will have passed in the entire project up to the beginning of that quarter. Additional construction resources will be added over the coming months to help achieve these targets."
The release of the six-monthly figures follows the announcement earlier this month that NBN Co exceeded its corporate plan target for work commenced or completed in brownfield fibre areas covering 758,000 homes and businesses by the end of 2012. Construction was commenced or completed for 784,600 premises by end December 2012.