Netflix is having a huge impact on Australia's internet infrastructure, with some claiming it is leading to slower, congested internet speeds during peak evening use periods.

But exactly how much of an impact is the streaming giant's service having?

Netflix's local launch has had a huge impact on the Australian internet's infrastructure.

While many telcos don't publish or release their traffic graphs, non-profit organisation IX Australia — which helps physically connect smaller ISPs with content players — does.

In the past week, public graphs from IX Australia show Friday night at about 10pm was when most of its members' customers were using Netflix. Member ISPs include Exetel, M2 Telecom (which owns the Dodo and iPrimus brands), and the Australian Academic and Research Network (AARNET), which provides internet connectivity to Australian universities.