From the thread that just got locked
"the easy way to tell your distance from the exchange is to find your downstream line attenuation and divide by 13.8 it gives your distance as 3.2 km, mine is 54db so divide by 13.8 and my distance is 3.9 km"
Based in this formula I'm 3.2 KM from Papatoetoe in Auckland. I get 5~6Mbits on the speed test. Is that good for 3.2Km on ADSL2??