As I wrote:
143.136.0.0/16 143.253.0.0/16 146.51.0.0/16
I tried to make contact myself with the legit owners of all of the above, but found it to be quite difficult. The registered owner of the first one appears to have gone into hiding on a remote island someplace.
Both relocated. I send queries to the current contact points.
I get reply from technical people in a company, which has originally assigned: 146.51.0.0/16 they said they have never transferred the block and allow me to post so here. So, RADB entry: https://pastebin.com/raw/ZNgNuvtt route: 146.51.0.0/16 origin: AS174 descr: Cogent mnt-by: MAINT-AS199267 changed: elad@netstyle.io 20190710 #17:02:13Z source: RADB is confirmed to be registration fraud. Masataka Ohta