These entries are queried from radb.net using whois, you can try my project getting these.
:AS137048 route: 103.51.53.0/24 origin: AS137048 descr: MOHAMMAD MAMUN College Road mnt-by: MAINT-SNC-BD last-modified: 2023-05-27T06:32:36Z source: APNIC rpki-ov-state: valid route: 103.103.32.0/24 descr: X-Link Limited origin: AS137048 mnt-by: MAINT-X-LINK-LTD last-modified: 2022-01-19T05:33:49Z source: APNIC rpki-ov-state: valid route: 103.103.33.0/24 descr: X-Link Limited origin: AS137048 mnt-by: MAINT-X-LINK-LTD last-modified: 2017-12-11T05:41:19Z source: APNIC rpki-ov-state: valid route: 103.103.34.0/24 descr: X-Link Limited origin: AS137048 mnt-by: MAINT-X-LINK-LTD last-modified: 2017-12-11T05:41:59Z source: APNIC rpki-ov-state: valid route: 103.103.35.0/24 descr: X-Link Limited origin: AS137048 mnt-by: MAINT-X-LINK-LTD last-modified: 2017-12-11T05:42:39Z source: APNIC rpki-ov-state: valid route: 103.124.53.0/24 descr: X-LINK LIMITED country: BD mnt-routes: MAINT-CDC-BD mnt-lower: MAINT-CDC-BD origin: AS137048 mnt-by: MAINT-CDC-BD last-modified: 2024-01-18T09:07:17Z source: APNIC rpki-ov-state: valid route6: 2401:ee40::/32 descr: X-LINK LIMITED origin: AS137048 mnt-by: MAINT-PENTA-BD last-modified: 2020-01-05T04:12:06Z source: APNIC rpki-ov-state: valid route6: 2401:ee40::/48 descr: X-LINK LIMITED origin: AS137048 mnt-by: MAINT-PENTA-BD last-modified: 2020-01-05T04:19:38Z source: APNIC rpki-ov-state: valid route6: 2401:ee40:1::/48 descr: X-LINK LIMITED origin: AS137048 mnt-by: MAINT-PENTA-BD last-modified: 2020-01-05T04:20:42Z source: APNIC rpki-ov-state: valid route6: 2401:ee40:2::/48 descr: X-LINK LIMITED origin: AS137048 mnt-by: MAINT-PENTA-BD last-modified: 2020-01-05T08:14:01Z source: APNIC rpki-ov-state: valid route6: 2401:ee40:3::/48 descr: X-LINK LIMITED origin: AS137048 mnt-by: MAINT-PENTA-BD last-modified: 2020-01-05T08:14:43Z source: APNIC rpki-ov-state: valid route6: 2401:ee40:4::/48 descr: X-LINK LIMITED origin: AS137048 mnt-by: MAINT-PENTA-BD last-modified: 2020-01-05T08:15:39Z source: APNIC rpki-ov-state: valid route6: 2401:ee40:5::/48 descr: X-LINK LIMITED origin: AS137048 mnt-by: MAINT-PENTA-BD last-modified: 2020-01-05T08:16:18Z source: APNIC rpki-ov-state: valid route6: 2401:ee40:6::/48 descr: X-LINK LIMITED origin: AS137048 mnt-by: MAINT-PENTA-BD last-modified: 2020-01-05T08:16:57Z source: APNIC rpki-ov-state: valid