These entries are queried from radb.net using whois, you can try my project getting these.
:AS139850 route: 103.146.54.0/23 origin: AS139850 descr: Md. Sohel Shop No-202, Brac Shopping Center Azampur Rail Gate, Dakshinkhan mnt-by: MAINT-HI-TEC-BD last-modified: 2019-12-05T05:09:34Z source: APNIC rpki-ov-state: valid route: 103.146.54.0/24 origin: AS139850 descr: Md. Sohel Shop No-202, Brac Shopping Center Azampur Rail Gate, Dakshinkhan mnt-by: MAINT-HI-TEC-BD last-modified: 2019-12-05T05:09:57Z source: APNIC rpki-ov-state: valid route: 103.146.55.0/24 origin: AS139850 descr: Md. Sohel Shop No-202, Brac Shopping Center Azampur Rail Gate, Dakshinkhan mnt-by: MAINT-HI-TEC-BD last-modified: 2019-12-05T05:10:26Z source: APNIC rpki-ov-state: valid