I'm the same, my ping usually sits at about 200, but the last few days it's been ranging from a steady 300-500. It's getting really annoying :S

Been with Optus for 7 months and its been gradually getting worse, I now get ping spikes everyday, every game, its especially worse between 3:00pm-11:00pm which is huge for peak hour time. I'll be switching to Telstra ASAP

was originally with telstra. was 170-190 for a year and a half. gradually got worse to 230. then we changed ISP to southern phone and 8am-8pm my ping ranges from 300-600 constantly moving then 8pm to 8am sits on around 280.. it'd be lovely if riot paid attention to their australian members but i somehow think its very unlikely..

4 40 ms 39 ms 39 ms bla5-ge5-0.gw.optusnet.com.au [211.29.125.245]
5 313 ms 355 ms 314 ms 203.208.190.101 <--

There's your issue and where the latency starts. A simple google search to that IP, the 203.208 one yields a lot of results from several people in different games over different periods of time.

im australian and hit 2k ping spikes so unplayable really turning me off the game