As of starting to live in Khon Kaen I should actually within 24hrs report myself to the local police but as I had to do my "90day reporting" anyway soon I thought "Lets have a look at the immigration office at Khon Kaen".
The Immigration Office is located along Mitthaphap road (route 2) in the northern section within the ring-road of Khon Kaen. Coming from Udon Thani it is just a few hundred meter before the intersection to the University. There are signs along the road.
You first pass the entrance gate and turn left and you will see a building with the sign of the Immigration Office. There is a table outside that you can use to fill-out your application form. The Office is on the left side and on the right side is a office where they can make photo copies of anything you need copied (except money I guess).
I walked into the Office and right next to the door is a lovely lady that speaks English and informs you what you need to do. She did give a TM.47 and told me to get photo copies of my passport. So I went outside, filled in my TM.47 and copied my passport. And went back into the Office where I was told to take a cue number, as I did. And within 2min I was served at counter 3 where a friendly officer who speaks English helped me, checked my papers and stamped my 90day reporting.
Altogether less as 10min!