These entries are queried from radb.net using whois, you can try my project getting these.
:AS141220 route: 103.156.180.0/23 origin: AS141220 descr: Md. Salim Mollah Baroipara, Baroipara (1349) Ashulia Dhaka mnt-by: MAINT-DISCOVERY24ONLINE-BD last-modified: 2021-03-03T12:11:56Z source: APNIC rpki-ov-state: valid route: 103.156.180.0/24 origin: AS141220 descr: Md. Salim Mollah Baroipara, Baroipara (1349) Ashulia Dhaka mnt-by: MAINT-DISCOVERY24ONLINE-BD last-modified: 2021-03-03T12:10:53Z source: APNIC rpki-ov-state: valid route6: 2001:df4:f280::/48 origin: AS141220 descr: Md. Salim Mollah Baroipara, Baroipara (1349) Ashulia Dhaka mnt-by: MAINT-DISCOVERY24ONLINE-BD last-modified: 2020-09-30T08:34:12Z source: APNIC rpki-ov-state: valid