These entries are queried from radb.net using whois, you can try my project getting these.
:AS134837 route: 103.149.186.0/23 descr: Dhaka Internet country: BD mnt-lower: MAINT-DHAKAINTERNET-BD mnt-routes: MAINT-DHAKAINTERNET-BD mnt-by: MAINT-DHAKAINTERNET-BD origin: AS134837 last-modified: 2020-04-04T07:09:30Z source: APNIC rpki-ov-state: valid route: 103.149.186.0/24 descr: Dhaka Internet country: BD mnt-lower: MAINT-DHAKAINTERNET-BD mnt-routes: MAINT-DHAKAINTERNET-BD mnt-by: MAINT-DHAKAINTERNET-BD origin: AS134837 last-modified: 2020-04-04T07:10:25Z source: APNIC rpki-ov-state: valid route: 103.149.187.0/24 descr: Dhaka Internet country: BD mnt-lower: MAINT-DHAKAINTERNET-BD mnt-routes: MAINT-DHAKAINTERNET-BD mnt-by: MAINT-DHAKAINTERNET-BD origin: AS134837 last-modified: 2020-04-04T07:11:07Z source: APNIC rpki-ov-state: valid route6: 2001:df3:3780::/48 descr: Monirul Islam t/a Dhaka Internet country: BD mnt-lower: MAINT-DHAKAINTERNET-BD mnt-routes: MAINT-DHAKAINTERNET-BD mnt-by: MAINT-DHAKAINTERNET-BD origin: AS134837 last-modified: 2020-03-24T06:57:14Z source: APNIC rpki-ov-state: valid