These entries are queried from radb.net using whois, you can try my project getting these.
:AS136379 route: 103.138.192.0/24 origin: AS136379 descr: Istanaimpian Corporation Limited Kbal Spean I village, PoiPet District mnt-by: MAINT-ICL-KH last-modified: 2019-09-08T09:39:08Z source: APNIC rpki-ov-state: valid route: 103.138.193.0/24 origin: AS136379 descr: Istanaimpian Corporation Limited Kbal Spean I village, PoiPet District mnt-by: MAINT-ICL-KH last-modified: 2019-09-13T19:05:53Z source: APNIC rpki-ov-state: valid route6: 2001:df0:5080::/48 origin: AS136379 descr: Istanaimpian Corporation Limited Kbal Spean I village, PoiPet District mnt-by: MAINT-ICL-KH last-modified: 2019-09-08T09:39:05Z source: APNIC rpki-ov-state: valid route6: 2001:df0:5080::/48 origin: AS136379 descr: NTC's DOWNSTREAM admin-c: RATHANA VAN tech-c: RATHANA VAN notify: netadmin [at] neocomisp.com mnt-by: MAINT-AS9902 changed: netadmin [at] neocomisp.com 20190618 #03:28:00Z source: RADB last-modified: 2023-11-13T15:56:39Z rpki-ov-state: valid