These entries are queried from radb.net using whois, you can try my project getting these.
:AS51447 route: 45.137.20.0/24 origin: AS51447 mnt-by: bd-rootlayer-1-mnt mnt-by: ROOTLAYERNET created: 2019-12-18T16:24:50Z last-modified: 2019-12-18T16:24:50Z source: RIPE remarks: **************************** remarks: * THIS OBJECT IS MODIFIED remarks: * Please note that all data that is generally regarded as personal remarks: * data has been removed from this object. remarks: * To view the original object, please query the RIPE Database at: remarks: * http://www.ripe.net/whois remarks: **************************** rpki-ov-state: valid route: 45.137.21.0/24 origin: AS51447 mnt-by: bd-rootlayer-1-mnt mnt-by: ROOTLAYERNET created: 2019-12-18T16:26:18Z last-modified: 2019-12-18T16:26:18Z source: RIPE remarks: **************************** remarks: * THIS OBJECT IS MODIFIED remarks: * Please note that all data that is generally regarded as personal remarks: * data has been removed from this object. remarks: * To view the original object, please query the RIPE Database at: remarks: * http://www.ripe.net/whois remarks: **************************** rpki-ov-state: valid route: 45.137.22.0/24 origin: AS51447 mnt-by: bd-rootlayer-1-mnt mnt-by: ROOTLAYERNET created: 2019-09-04T10:29:12Z last-modified: 2019-09-04T10:29:12Z source: RIPE remarks: **************************** remarks: * THIS OBJECT IS MODIFIED remarks: * Please note that all data that is generally regarded as personal remarks: * data has been removed from this object. remarks: * To view the original object, please query the RIPE Database at: remarks: * http://www.ripe.net/whois remarks: **************************** rpki-ov-state: valid route: 45.137.23.0/24 origin: AS51447 mnt-by: bd-rootlayer-1-mnt mnt-by: ROOTLAYERNET created: 2020-06-24T14:21:00Z last-modified: 2020-06-24T14:21:00Z source: RIPE remarks: **************************** remarks: * THIS OBJECT IS MODIFIED remarks: * Please note that all data that is generally regarded as personal remarks: * data has been removed from this object. remarks: * To view the original object, please query the RIPE Database at: remarks: * http://www.ripe.net/whois remarks: **************************** rpki-ov-state: valid route: 103.178.236.0/24 origin: AS51447 descr: RootLayer Web Services LTD. 134/7 B, Furfura Sharif Road, Darus Salam, Mirpur, Dhaka mnt-by: MAINT-RWSL-BD last-modified: 2022-01-26T19:28:18Z source: APNIC rpki-ov-state: valid route: 103.178.237.0/24 origin: AS51447 descr: RootLayer Web Services LTD. 134/7 B, Furfura Sharif Road, Darus Salam, Mirpur, Dhaka mnt-by: MAINT-RWSL-BD last-modified: 2022-01-26T19:34:38Z source: APNIC rpki-ov-state: valid route: 185.222.56.0/24 origin: AS51447 mnt-by: bd-rootlayer-1-mnt mnt-by: ROOTLAYERNET created: 2018-09-14T18:50:22Z last-modified: 2018-09-14T18:50:22Z source: RIPE remarks: **************************** remarks: * THIS OBJECT IS MODIFIED remarks: * Please note that all data that is generally regarded as personal remarks: * data has been removed from this object. remarks: * To view the original object, please query the RIPE Database at: remarks: * http://www.ripe.net/whois remarks: **************************** rpki-ov-state: valid route: 185.222.57.0/24 origin: AS51447 mnt-by: bd-rootlayer-1-mnt mnt-by: ROOTLAYERNET created: 2018-09-14T18:51:11Z last-modified: 2018-09-14T18:51:11Z source: RIPE remarks: **************************** remarks: * THIS OBJECT IS MODIFIED remarks: * Please note that all data that is generally regarded as personal remarks: * data has been removed from this object. remarks: * To view the original object, please query the RIPE Database at: remarks: * http://www.ripe.net/whois remarks: **************************** rpki-ov-state: valid route: 185.222.58.0/24 origin: AS51447 mnt-by: bd-rootlayer-1-mnt mnt-by: ROOTLAYERNET created: 2018-09-14T18:51:53Z last-modified: 2018-09-14T18:51:53Z source: RIPE remarks: **************************** remarks: * THIS OBJECT IS MODIFIED remarks: * Please note that all data that is generally regarded as personal remarks: * data has been removed from this object. remarks: * To view the original object, please query the RIPE Database at: remarks: * http://www.ripe.net/whois remarks: **************************** rpki-ov-state: valid route: 185.222.59.0/24 origin: AS51447 mnt-by: bd-rootlayer-1-mnt mnt-by: ROOTLAYERNET created: 2022-08-05T08:33:26Z last-modified: 2022-08-05T08:33:26Z source: RIPE remarks: **************************** remarks: * THIS OBJECT IS MODIFIED remarks: * Please note that all data that is generally regarded as personal remarks: * data has been removed from this object. remarks: * To view the original object, please query the RIPE Database at: remarks: * http://www.ripe.net/whois remarks: **************************** rpki-ov-state: valid route6: 2a0c:ac00::/29 origin: AS51447 mnt-by: ROOTLAYERNET mnt-by: bd-rootlayer-1-mnt created: 2017-10-05T12:15:29Z last-modified: 2017-10-05T12:15:29Z source: RIPE remarks: **************************** remarks: * THIS OBJECT IS MODIFIED remarks: * Please note that all data that is generally regarded as personal remarks: * data has been removed from this object. remarks: * To view the original object, please query the RIPE Database at: remarks: * http://www.ripe.net/whois remarks: **************************** rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source