These entries are queried from radb.net using whois, you can try my project getting these.
:AS138649 route: 103.135.132.0/22 origin: AS138649 descr: Mohammad Nurnabi Sarker Kathaltala Bazar, P.O: Saydabad, P.S: Sirajganj mnt-by: MAINT-SARKERNET-BD last-modified: 2019-03-04T07:06:50Z country: BD source: APNIC rpki-ov-state: valid route: 103.135.132.0/23 origin: AS138649 descr: Mohammad Nurnabi Sarker Kathaltala Bazar, P.O: Saydabad, P.S: Sirajganj mnt-by: MAINT-SARKERNET-BD last-modified: 2020-01-09T14:08:55Z source: APNIC rpki-ov-state: valid route: 103.135.132.0/24 origin: AS138649 descr: Mohammad Nurnabi Sarker Kathaltala Bazar, P.O: Saydabad, P.S: Sirajganj mnt-by: MAINT-SARKERNET-BD last-modified: 2021-02-21T06:29:57Z country: BD source: APNIC rpki-ov-state: valid route: 103.135.133.0/24 origin: AS138649 descr: Mohammad Nurnabi Sarker Kathaltala Bazar, P.O: Saydabad, P.S: Sirajganj mnt-by: MAINT-SARKERNET-BD last-modified: 2020-01-09T14:09:35Z source: APNIC rpki-ov-state: valid route6: 2404:7e40::/32 descr: Sarker Net origin: AS138649 mnt-by: MAINT-SARKERNET-BD country: BD mnt-routes: MAINT-SARKERNET-BD mnt-lower: MAINT-SARKERNET-BD last-modified: 2020-03-16T10:17:06Z source: APNIC rpki-ov-state: valid route6: 2404:7e40::/48 descr: Sarker Net origin: AS138649 mnt-by: MAINT-SARKERNET-BD country: BD mnt-routes: MAINT-SARKERNET-BD mnt-lower: MAINT-SARKERNET-BD last-modified: 2020-03-16T10:18:30Z source: APNIC rpki-ov-state: valid route6: 2404:7e40:1::/48 origin: AS138649 descr: Mohammad Nurnabi Sarker Kathaltala Bazar, P.O: Saydabad, P.S: Sirajganj mnt-by: MAINT-SARKERNET-BD last-modified: 2020-12-05T11:39:44Z source: APNIC rpki-ov-state: valid route6: 2404:7e40:2::/48 origin: AS138649 descr: Mohammad Nurnabi Sarker Kathaltala Bazar, P.O: Saydabad, P.S: Sirajganj mnt-by: MAINT-SARKERNET-BD last-modified: 2023-01-22T07:44:09Z country: BD source: APNIC rpki-ov-state: valid route6: 2404:7e40:3::/48 origin: AS138649 descr: Mohammad Nurnabi Sarker Kathaltala Bazar, P.O: Saydabad, P.S: Sirajganj mnt-by: MAINT-SARKERNET-BD last-modified: 2023-01-23T10:38:14Z source: APNIC rpki-ov-state: valid route6: 2404:7e40:4::/48 origin: AS138649 descr: Mohammad Nurnabi Sarker Kathaltala Bazar, P.O: Saydabad, P.S: Sirajganj descr: Sarker Net, Sirajganj (IPv6 for Client) mnt-by: MAINT-SARKERNET-BD last-modified: 2023-01-22T08:08:28Z source: APNIC rpki-ov-state: valid route6: 2404:7e40:5::/48 descr: Sarker Net (IPv6) origin: AS138649 mnt-by: MAINT-SARKERNET-BD last-modified: 2023-01-28T08:30:42Z country: BD source: APNIC rpki-ov-state: valid