These entries are queried from radb.net using whois, you can try my project getting these.
:AS135597 route: 103.171.250.0/23 descr: Route object for GBN origin: AS135597 mnt-by: MAINT-GBN-BD last-modified: 2021-08-23T11:02:04Z source: APNIC rpki-ov-state: valid route: 103.171.250.0/24 origin: AS135597 descr: Md Munchurul Haque Kibria Bridge Road, Gaibandha mnt-by: MAINT-GBN-BD last-modified: 2021-08-23T11:03:00Z source: APNIC rpki-ov-state: valid route: 103.171.251.0/24 origin: AS135597 descr: Md Munchurul Haque Kibria Bridge Road, Gaibandha mnt-by: MAINT-GBN-BD last-modified: 2021-08-23T11:03:01Z source: APNIC rpki-ov-state: valid