These entries are queried from radb.net using whois, you can try my project getting these.
:AS51531 route: 45.90.152.0/22 origin: AS51531 mnt-by: DECIX-MNT created: 2020-03-27T09:11:37Z last-modified: 2020-03-27T09:22:19Z 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 route: 45.129.80.0/22 origin: AS51531 mnt-by: DECIX-MNT created: 2020-03-25T15:46:29Z last-modified: 2020-03-25T15:46:29Z 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: valid route: 45.159.240.0/22 origin: AS51531 mnt-by: DECIX-MNT created: 2020-03-27T09:13:50Z last-modified: 2020-03-27T09:22:13Z 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: 46.31.120.0/21 descr: DE-CIX Management GmbH Services origin: AS51531 mnt-by: DECIX-MNT created: 2010-10-05T09:07:24Z last-modified: 2016-09-11T18:30:51Z 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: 81.89.88.0/21 origin: AS51531 mnt-by: DECIX-MNT created: 2020-03-27T09:20:48Z last-modified: 2020-03-27T09:21:00Z 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: 185.70.20.0/22 descr: DE-CIX Management GmbH Services org: ORG-DtGI1-RIPE origin: AS51531 mnt-by: DECIX-MNT created: 2014-09-28T17:11:52Z last-modified: 2016-09-11T18:39:41Z 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: 185.176.192.0/22 origin: AS51531 mnt-by: DECIX-MNT created: 2020-03-27T09:12:18Z last-modified: 2020-03-27T09:21:34Z 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: 2001:67c:4::/48 descr: DE-CIX Management GmbH origin: AS51531 mnt-by: DECIX-MNT created: 2014-09-11T22:47:58Z last-modified: 2019-02-15T09:05:07Z 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: 2a02:c50::/32 descr: DE-CIX Management GmbH origin: AS51531 org: ORG-DtGI1-RIPE mnt-by: DECIX-MNT created: 2014-09-14T14:59:06Z last-modified: 2014-09-14T14:59:06Z 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