[44net] 44.190 addresses and geolocation ?

Hi all, We are migrating our TKNet network to AMPRNet addressing. For machines directly connected to Internet (ie : XLX, DMR), we are using 44.190.11.0/24 range. Those addresses are geo-located in Chicago. This has funny consequences. F/ex, when doing speed tests with online services such as nperf.com, the automatically-selected "nearest" server is very far from here :-) I have absolutely no idea about how geolocation works. Just for curiosity, where is this information taken from ? The Whois database ? But Brian's address is in San Diego, not in Chicago... Is there an easy way to change geo-location information for a specific AMPR subnet ? Thank you in advance. 73 de TK1BI