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: e...@netstyle.io 20190710 #17:02:13Z
source: RADB
is confirmed to be registration fraud.
Masataka Ohta