These entries are queried from radb.net using whois, you can try my project getting these.
:AS58813 route: 103.17.36.0/22 descr: Route Object for 103.17.36.0/22 origin: AS58813 remarks: For routing issue please mail send to ******** mnt-lower: MAINT-DTECH-BD mnt-routes: MAINT-DTECH-BD mnt-by: MAINT-DTECH-BD last-modified: 2013-03-20T05:20:24Z source: APNIC rpki-ov-state: valid route: 103.17.36.0/23 descr: Route Object for 103.17.36.0/23 origin: AS58813 remarks: For routing issue please mail send to ******** mnt-lower: MAINT-DTECH-BD mnt-routes: MAINT-DTECH-BD mnt-by: MAINT-DTECH-BD last-modified: 2013-03-20T05:21:41Z source: APNIC rpki-ov-state: valid route: 103.17.36.0/24 descr: Route Object for 103.17.36.0/24 origin: AS58813 remarks: For routing issue please mail send to ******** mnt-lower: MAINT-DTECH-BD mnt-routes: MAINT-DTECH-BD mnt-by: MAINT-DTECH-BD last-modified: 2013-03-20T05:20:56Z source: APNIC rpki-ov-state: valid route: 103.17.37.0/24 descr: Route Object for 103.17.37.0/24 origin: AS58813 remarks: For routing issue please mail send to ******** mnt-lower: MAINT-DTECH-BD mnt-routes: MAINT-DTECH-BD mnt-by: MAINT-DTECH-BD last-modified: 2013-03-20T05:21:08Z source: APNIC rpki-ov-state: valid route: 103.17.38.0/23 descr: Route Object for 103.17.38.0/23 origin: AS58813 remarks: For routing issue please mail send to ******** mnt-lower: MAINT-DTECH-BD mnt-routes: MAINT-DTECH-BD mnt-by: MAINT-DTECH-BD last-modified: 2013-03-20T05:21:52Z source: APNIC rpki-ov-state: valid route: 103.17.38.0/24 descr: Route Object for 103.17.38.0/24 origin: AS58813 remarks: For routing issue please mail send to ******** mnt-lower: MAINT-DTECH-BD mnt-routes: MAINT-DTECH-BD mnt-by: MAINT-DTECH-BD last-modified: 2013-03-20T05:21:17Z source: APNIC rpki-ov-state: valid route: 103.17.39.0/24 descr: Route Object for 103.17.39.0/24 origin: AS58813 remarks: For routing issue please mail send to ******** mnt-lower: MAINT-DTECH-BD mnt-routes: MAINT-DTECH-BD mnt-by: MAINT-DTECH-BD last-modified: 2013-03-20T05:21:26Z source: APNIC rpki-ov-state: valid route: 163.53.180.0/22 descr: Route Object for 163.53.180.0/22 origin: AS58813 mnt-lower: MAINT-DTECH-BD mnt-routes: MAINT-DTECH-BD mnt-by: MAINT-DTECH-BD last-modified: 2014-07-15T01:35:40Z source: APNIC rpki-ov-state: valid route: 163.53.180.0/23 descr: Route Object for 163.53.180.0/23 origin: AS58813 mnt-lower: MAINT-DTECH-BD mnt-routes: MAINT-DTECH-BD mnt-by: MAINT-DTECH-BD last-modified: 2014-07-15T01:35:47Z source: APNIC rpki-ov-state: valid route: 163.53.180.0/24 descr: Route Object for 163.53.180.0/24 origin: AS58813 mnt-lower: MAINT-DTECH-BD mnt-routes: MAINT-DTECH-BD mnt-by: MAINT-DTECH-BD last-modified: 2014-07-15T01:33:52Z source: APNIC rpki-ov-state: valid route: 163.53.181.0/24 descr: Route Object for 163.53.181.0/24 origin: AS58813 mnt-lower: MAINT-DTECH-BD mnt-routes: MAINT-DTECH-BD mnt-by: MAINT-DTECH-BD last-modified: 2014-07-15T01:35:05Z source: APNIC rpki-ov-state: valid route: 163.53.182.0/23 descr: Route Object for 163.53.182.0/23 origin: AS58813 mnt-lower: MAINT-DTECH-BD mnt-routes: MAINT-DTECH-BD mnt-by: MAINT-DTECH-BD last-modified: 2014-07-15T01:35:55Z source: APNIC rpki-ov-state: valid route: 163.53.182.0/24 descr: Route Object for 163.53.182.0/24 origin: AS58813 mnt-lower: MAINT-DTECH-BD mnt-routes: MAINT-DTECH-BD mnt-by: MAINT-DTECH-BD last-modified: 2014-07-15T01:34:19Z source: APNIC rpki-ov-state: valid route: 163.53.183.0/24 descr: Route Object for 163.53.183.0/24 origin: AS58813 mnt-lower: MAINT-DTECH-BD mnt-routes: MAINT-DTECH-BD mnt-by: MAINT-DTECH-BD last-modified: 2014-07-15T01:34:29Z source: APNIC rpki-ov-state: valid route6: 2405:d440::/32 mnt-by: MAINT-DTECH-BD origin: AS58813 descr: Dtech Limited House: 59(5th Floor) Road:04, Block: C, Banani, Dhaka last-modified: 2020-06-27T05:39:34Z source: APNIC rpki-ov-state: valid route6: 2405:d440:100::/48 mnt-by: MAINT-DTECH-BD mnt-routes: MAINT-DTECH-BD origin: AS58813 descr: Dtech Limited House: 59(5th Floor) Road:04, Block: C, Banani, Dhaka last-modified: 2020-06-27T05:57:29Z source: APNIC rpki-ov-state: valid route6: 2405:d440:1fb::/48 mnt-by: MAINT-DTECH-BD mnt-routes: MAINT-DTECH-BD origin: AS58813 descr: Dtech Limited House: 59(5th Floor) Road:04, Block: C, Banani, Dhaka last-modified: 2020-06-27T06:05:57Z source: APNIC rpki-ov-state: valid route6: 2405:d440:1fc::/48 mnt-by: MAINT-DTECH-BD mnt-routes: MAINT-DTECH-BD origin: AS58813 descr: Dtech Limited House: 59(5th Floor) Road:04, Block: C, Banani, Dhaka last-modified: 2020-06-27T06:09:43Z source: APNIC rpki-ov-state: valid