These entries are queried from radb.net using whois, you can try my project getting these.
:AS12998 route: 5.183.200.0/22 descr: BGNet network descr: Tarasivska str. 2/21 descr: Kyiv, Ukraine origin: AS12998 mnt-by: AS12998-MNT created: 2019-04-12T09:04:21Z last-modified: 2019-04-12T09:04:21Z 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: 91.196.100.0/22 descr: BGNet ISP network origin: AS12998 mnt-by: AS12998-MNT created: 2007-06-14T18:43:59Z last-modified: 2007-06-14T18:43:59Z 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: 91.196.103.0/24 descr: BGNet ISP network origin: AS12998 mnt-by: AS12998-MNT created: 2010-08-31T16:46:21Z last-modified: 2010-08-31T16:46:21Z 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: 193.227.206.0/23 descr: Kyiv, Ukraine descr: Tarasivska str. 2/21 descr: BgNet ISP Network origin: AS12998 mnt-by: AS12998-MNT created: 1970-01-01T00:00:00Z last-modified: 2006-08-09T13:45:59Z 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: 195.3.156.0/22 descr: BGNet network descr: Tarasivska str. 2/21 descr: Kyiv, Ukraine origin: AS12998 mnt-by: AS12998-MNT created: 2006-08-09T16:10:16Z last-modified: 2006-08-09T16:10:16Z 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: 2a0a:2c0:5::/48 descr: BGNET v6 origin: AS12998 mnt-by: K-Link-MNT mnt-by: AS12998-MNT created: 2022-01-19T02:24:06Z last-modified: 2022-01-19T02:24:06Z 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