These entries are queried from radb.net using whois, you can try my project getting these.
:AS138587 route: 103.133.252.0/22 origin: AS138587 descr: Patuakhali Science and Technology University Dumki Patuakhali mnt-by: MAINT-PSTU-BD last-modified: 2019-03-04T15:57:21Z source: APNIC rpki-ov-state: valid route: 103.133.252.0/23 origin: AS138587 descr: Patuakhali Science and Technology University Dumki Patuakhali mnt-by: MAINT-PSTU-BD last-modified: 2019-03-04T15:57:22Z source: APNIC rpki-ov-state: valid route: 103.133.252.0/24 origin: AS138587 descr: Patuakhali Science and Technology University Dumki Patuakhali mnt-by: MAINT-PSTU-BD last-modified: 2019-03-04T15:57:22Z source: APNIC rpki-ov-state: valid route: 103.133.253.0/24 origin: AS138587 descr: Patuakhali Science and Technology University Dumki Patuakhali mnt-by: MAINT-PSTU-BD last-modified: 2019-03-04T15:57:23Z source: APNIC rpki-ov-state: valid route: 103.133.254.0/23 origin: AS138587 descr: Patuakhali Science and Technology University Dumki Patuakhali mnt-by: MAINT-PSTU-BD last-modified: 2019-03-04T15:57:23Z source: APNIC rpki-ov-state: valid route: 103.133.254.0/24 origin: AS138587 descr: Patuakhali Science and Technology University Dumki Patuakhali mnt-by: MAINT-PSTU-BD last-modified: 2019-03-04T15:57:24Z source: APNIC rpki-ov-state: valid route: 103.133.255.0/24 origin: AS138587 descr: Patuakhali Science and Technology University Dumki Patuakhali mnt-by: MAINT-PSTU-BD last-modified: 2019-03-04T15:57:25Z source: APNIC rpki-ov-state: valid route6: 2404:57c0::/32 origin: AS138587 descr: Patuakhali Science and Technology University Dumki Patuakhali-8602 Bangladesh mnt-by: MAINT-PSTU-BD last-modified: 2019-10-22T07:54:37Z source: APNIC rpki-ov-state: valid route6: 2404:57c0::/33 origin: AS138587 descr: Patuakhali Science and Technology University Dumki Patuakhali-8602 Bangladesh mnt-by: MAINT-PSTU-BD last-modified: 2019-10-22T07:54:38Z source: APNIC rpki-ov-state: valid route6: 2404:57c0::/34 origin: AS138587 descr: Patuakhali Science and Technology University Dumki Patuakhali-8602 Bangladesh mnt-by: MAINT-PSTU-BD last-modified: 2019-10-22T07:54:40Z source: APNIC rpki-ov-state: valid route6: 2404:57c0::/35 origin: AS138587 descr: Patuakhali Science and Technology University Dumki Patuakhali-8602 Bangladesh mnt-by: MAINT-PSTU-BD last-modified: 2019-10-22T07:54:40Z source: APNIC rpki-ov-state: valid route6: 2404:57c0::/36 origin: AS138587 descr: Patuakhali Science and Technology University Dumki Patuakhali-8602 Bangladesh mnt-by: MAINT-PSTU-BD last-modified: 2019-10-22T07:54:42Z source: APNIC rpki-ov-state: valid route6: 2404:57c0:1000::/36 origin: AS138587 descr: Patuakhali Science and Technology University Dumki Patuakhali-8602 Bangladesh mnt-by: MAINT-PSTU-BD last-modified: 2019-10-22T07:54:43Z source: APNIC rpki-ov-state: valid route6: 2404:57c0:2000::/35 origin: AS138587 descr: Patuakhali Science and Technology University Dumki Patuakhali-8602 Bangladesh mnt-by: MAINT-PSTU-BD last-modified: 2019-10-22T07:54:44Z source: APNIC rpki-ov-state: valid route6: 2404:57c0:2000::/36 origin: AS138587 descr: Patuakhali Science and Technology University Dumki Patuakhali-8602 Bangladesh mnt-by: MAINT-PSTU-BD last-modified: 2019-10-22T07:54:45Z source: APNIC rpki-ov-state: valid route6: 2404:57c0:3000::/36 origin: AS138587 descr: Patuakhali Science and Technology University Dumki Patuakhali-8602 Bangladesh mnt-by: MAINT-PSTU-BD last-modified: 2019-10-22T07:54:46Z source: APNIC rpki-ov-state: valid route6: 2404:57c0:4000::/34 origin: AS138587 descr: Patuakhali Science and Technology University Dumki Patuakhali-8602 Bangladesh mnt-by: MAINT-PSTU-BD last-modified: 2019-10-22T07:54:47Z source: APNIC rpki-ov-state: valid route6: 2404:57c0:4000::/35 origin: AS138587 descr: Patuakhali Science and Technology University Dumki Patuakhali-8602 Bangladesh mnt-by: MAINT-PSTU-BD last-modified: 2019-10-22T07:54:48Z source: APNIC rpki-ov-state: valid route6: 2404:57c0:4000::/36 origin: AS138587 descr: Patuakhali Science and Technology University Dumki Patuakhali-8602 Bangladesh mnt-by: MAINT-PSTU-BD last-modified: 2019-10-22T07:54:49Z source: APNIC rpki-ov-state: valid route6: 2404:57c0:5000::/36 origin: AS138587 descr: Patuakhali Science and Technology University Dumki Patuakhali-8602 Bangladesh mnt-by: MAINT-PSTU-BD last-modified: 2019-10-22T07:54:50Z source: APNIC rpki-ov-state: valid route6: 2404:57c0:6000::/35 origin: AS138587 descr: Patuakhali Science and Technology University Dumki Patuakhali-8602 Bangladesh mnt-by: MAINT-PSTU-BD last-modified: 2019-10-22T07:54:51Z source: APNIC rpki-ov-state: valid route6: 2404:57c0:6000::/36 origin: AS138587 descr: Patuakhali Science and Technology University Dumki Patuakhali-8602 Bangladesh mnt-by: MAINT-PSTU-BD last-modified: 2019-10-22T07:54:52Z source: APNIC rpki-ov-state: valid route6: 2404:57c0:7000::/36 origin: AS138587 descr: Patuakhali Science and Technology University Dumki Patuakhali-8602 Bangladesh mnt-by: MAINT-PSTU-BD last-modified: 2019-10-22T07:54:53Z source: APNIC rpki-ov-state: valid route6: 2404:57c0:8000::/33 origin: AS138587 descr: Patuakhali Science and Technology University Dumki Patuakhali-8602 Bangladesh mnt-by: MAINT-PSTU-BD last-modified: 2019-10-22T07:54:54Z source: APNIC rpki-ov-state: valid route6: 2404:57c0:8000::/34 origin: AS138587 descr: Patuakhali Science and Technology University Dumki Patuakhali-8602 Bangladesh mnt-by: MAINT-PSTU-BD last-modified: 2019-10-22T07:54:55Z source: APNIC rpki-ov-state: valid route6: 2404:57c0:8000::/35 origin: AS138587 descr: Patuakhali Science and Technology University Dumki Patuakhali-8602 Bangladesh mnt-by: MAINT-PSTU-BD last-modified: 2019-10-22T07:54:56Z source: APNIC rpki-ov-state: valid route6: 2404:57c0:8000::/36 origin: AS138587 descr: Patuakhali Science and Technology University Dumki Patuakhali-8602 Bangladesh mnt-by: MAINT-PSTU-BD last-modified: 2019-10-22T07:54:57Z source: APNIC rpki-ov-state: valid route6: 2404:57c0:9000::/36 origin: AS138587 descr: Patuakhali Science and Technology University Dumki Patuakhali-8602 Bangladesh mnt-by: MAINT-PSTU-BD last-modified: 2019-10-22T07:54:59Z source: APNIC rpki-ov-state: valid route6: 2404:57c0:a000::/35 origin: AS138587 descr: Patuakhali Science and Technology University Dumki Patuakhali-8602 Bangladesh mnt-by: MAINT-PSTU-BD last-modified: 2019-10-22T07:55:00Z source: APNIC rpki-ov-state: valid route6: 2404:57c0:a000::/36 origin: AS138587 descr: Patuakhali Science and Technology University Dumki Patuakhali-8602 Bangladesh mnt-by: MAINT-PSTU-BD last-modified: 2019-10-22T07:55:01Z source: APNIC rpki-ov-state: valid route6: 2404:57c0:b000::/36 origin: AS138587 descr: Patuakhali Science and Technology University Dumki Patuakhali-8602 Bangladesh mnt-by: MAINT-PSTU-BD last-modified: 2019-10-22T07:55:02Z source: APNIC rpki-ov-state: valid route6: 2404:57c0:c000::/34 origin: AS138587 descr: Patuakhali Science and Technology University Dumki Patuakhali-8602 Bangladesh mnt-by: MAINT-PSTU-BD last-modified: 2019-10-22T07:55:03Z source: APNIC rpki-ov-state: valid route6: 2404:57c0:c000::/35 origin: AS138587 descr: Patuakhali Science and Technology University Dumki Patuakhali-8602 Bangladesh mnt-by: MAINT-PSTU-BD last-modified: 2019-10-22T07:55:04Z source: APNIC rpki-ov-state: valid route6: 2404:57c0:c000::/36 origin: AS138587 descr: Patuakhali Science and Technology University Dumki Patuakhali-8602 Bangladesh mnt-by: MAINT-PSTU-BD last-modified: 2019-10-22T07:55:06Z source: APNIC rpki-ov-state: valid route6: 2404:57c0:d000::/36 origin: AS138587 descr: Patuakhali Science and Technology University Dumki Patuakhali-8602 Bangladesh mnt-by: MAINT-PSTU-BD last-modified: 2019-10-22T07:55:07Z source: APNIC rpki-ov-state: valid route6: 2404:57c0:e000::/35 origin: AS138587 descr: Patuakhali Science and Technology University Dumki Patuakhali-8602 Bangladesh mnt-by: MAINT-PSTU-BD last-modified: 2019-10-22T07:55:08Z source: APNIC rpki-ov-state: valid route6: 2404:57c0:e000::/36 origin: AS138587 descr: Patuakhali Science and Technology University Dumki Patuakhali-8602 Bangladesh mnt-by: MAINT-PSTU-BD last-modified: 2019-10-22T07:55:13Z source: APNIC rpki-ov-state: valid route6: 2404:57c0:f000::/36 origin: AS138587 descr: Patuakhali Science and Technology University Dumki Patuakhali-8602 Bangladesh mnt-by: MAINT-PSTU-BD last-modified: 2019-10-22T07:55:14Z source: APNIC rpki-ov-state: valid