These entries are queried from radb.net using whois, you can try my project getting these.
:AS57816 route: 37.9.248.0/22 origin: AS57816 mnt-by: SAMEN-MNT created: 2019-12-04T14:27:33Z last-modified: 2019-12-04T14:27:33Z 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: 37.9.248.0/23 descr: Samen EA Route object origin: AS57816 mnt-by: SAMEN-MNT created: 2016-02-14T08:13:28Z last-modified: 2016-02-14T08:13:28Z 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: 37.9.250.0/23 descr: Samen EA Route object origin: AS57816 mnt-by: SAMEN-MNT created: 2016-02-14T08:12:28Z last-modified: 2016-02-14T08:12:28Z 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: 185.118.136.0/22 descr: Samen EA Route object origin: AS57816 mnt-by: SAMEN-MNT created: 2016-02-14T08:23:33Z last-modified: 2016-02-14T08:23:33Z 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: 185.118.136.0/23 descr: Samen EA Route object origin: AS57816 mnt-by: SAMEN-MNT created: 2016-02-14T08:37:21Z last-modified: 2016-02-14T08:37:21Z 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: 185.118.138.0/23 descr: Samen EA Route object origin: AS57816 mnt-by: SAMEN-MNT created: 2016-02-14T08:37:48Z last-modified: 2016-02-14T08:37:48Z 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