These entries are queried from radb.net using whois, you can try my project getting these.
:AS38259 route: 122.248.0.0/20 descr: route object for 122.248.0.0/20 origin: AS38259 country: BD mnt-lower: MAINT-BD-XNET mnt-routes: MAINT-BD-XNET mnt-by: MAINT-BD-XNET last-modified: 2011-02-01T06:14:05Z source: APNIC rpki-ov-state: valid route: 122.248.0.0/24 origin: AS38259 descr: X-Net Limited Suite: 1402, Concord Tower, 113 Kazi Nazrul Islam Avenue descr: X-Net Limited mnt-by: MAINT-BD-XNET last-modified: 2021-12-21T07:13:06Z country: BD source: APNIC rpki-ov-state: valid route: 122.248.1.0/24 origin: AS38259 descr: X-Net Limited Suite: 1402, Concord Tower, 113 Kazi Nazrul Islam Avenue descr: X-Net Limited mnt-by: MAINT-BD-XNET last-modified: 2021-12-21T07:14:38Z country: BD source: APNIC rpki-ov-state: valid route: 202.84.64.0/21 descr: route object for 202.84.64.0/21 origin: AS38259 country: BD mnt-lower: MAINT-BD-XNET mnt-routes: MAINT-BD-XNET mnt-by: MAINT-BD-XNET last-modified: 2011-02-01T06:15:25Z source: APNIC rpki-ov-state: valid