These entries are queried from radb.net using whois, you can try my project getting these.
:AS137997 route: 103.48.163.0/24 origin: AS137997 descr: MD. SHAKIL AHMED 32 BEGUM GONJ LANE DHAKA mnt-by: MAINT-ICOMMUNICATIONBD-BD last-modified: 2023-10-30T11:16:04Z source: APNIC rpki-ov-state: valid