These entries are queried from radb.net using whois, you can try my project getting these.
:AS139042 route6: 2407:3b40::/32 origin: AS139042 descr: SpeedLinks Karamotia Mosjid Moor Munshipara Rangpur mnt-by: MAINT-SPEEDLINKS-BD last-modified: 2022-11-07T11:49:36Z country: BD source: APNIC rpki-ov-state: valid route6: 2407:3b40:8000::/36 origin: AS139042 descr: Md Ziaul Haider Khan Karamotia Mosjid Moor Munshipara Word no-18, mnt-by: MAINT-SPEEDLINKS-BD last-modified: 2023-05-17T09:10:40Z source: APNIC rpki-ov-state: valid route6: 2407:3b40:b000::/36 origin: AS139042 descr: Md Ziaul Haider Khan Karamotia Mosjid Moor Munshipara Word no-18, mnt-by: MAINT-SPEEDLINKS-BD last-modified: 2023-05-17T09:17:05Z source: APNIC rpki-ov-state: valid route6: 2407:3b40:c000::/36 origin: AS139042 descr: Md Ziaul Haider Khan Karamotia Mosjid Moor Munshipara Word no-18, mnt-by: MAINT-SPEEDLINKS-BD last-modified: 2023-12-03T15:13:44Z source: APNIC rpki-ov-state: valid