These entries are queried from radb.net using whois, you can try my project getting these.
:AS44513 route: 31.15.72.0/21 descr: ############################################ descr: # IPV4 class from OPTIMAITALIA S.P.A. descr: # OPTIMAITALIA NETWORK descr: ############################################ origin: AS44513 mnt-by: MNT-OPTIMAITALIA created: 2011-05-10T10:48:49Z last-modified: 2011-05-10T10:48:49Z 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: 80.69.240.0/20 origin: AS44513 descr: # IPV4 class from OPTIMAITALIA S.P.A. descr: # OPTIMAITALIA NETWORK mnt-by: MNT-OPTIMAITALIA created: 2018-11-20T14:46:00Z last-modified: 2018-11-20T14:46:00Z 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: 92.43.240.0/21 descr: OPTIMAITALIA NETWORK origin: AS44513 mnt-by: MNT-OPTIMAITALIA created: 2008-10-03T07:24:21Z last-modified: 2008-10-03T07:24:21Z 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: valid route: 185.129.88.0/22 descr: OPTIMAITALIA NETWORK origin: AS44513 mnt-by: MNT-OPTIMAITALIA created: 2015-12-02T09:07:25Z last-modified: 2015-12-02T09:07:25Z 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: 195.181.176.0/20 origin: AS44513 descr: # IPV4 class from OPTIMAITALIA S.P.A. descr: # OPTIMAITALIA NETWORK mnt-by: MNT-OPTIMAITALIA created: 2017-02-14T10:16:21Z last-modified: 2017-02-14T10:16:21Z 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: valid route: 213.32.208.0/20 origin: AS44513 descr: # IPV4 class from OPTIMAITALIA S.P.A. descr: # OPTIMAITALIA NETWORK mnt-by: MNT-OPTIMAITALIA created: 2016-10-06T15:51:11Z last-modified: 2016-10-06T15:54:09Z 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:ec8::/32 descr: OPTIMAITALIA IPV6 NETWORK origin: AS44513 mnt-by: MNT-OPTIMAITALIA created: 2009-05-22T17:29:18Z last-modified: 2009-05-22T17:29:18Z 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: not_found # No ROAs found, or RPKI validation not enabled for source