These entries are queried from radb.net using whois, you can try my project getting these.
:AS138325 route: 103.122.248.0/24 origin: AS138325 descr: Lutfor Rahman Sarkar Super Complex, Mawna, Sreepur, Gazipur, Bangladesh mnt-by: MAINT-ETHERLINK-BD last-modified: 2021-01-15T15:33:11Z source: APNIC rpki-ov-state: valid