These entries are queried from radb.net using whois, you can try my project getting these.
:AS12748 route: 5.183.20.0/22 origin: AS12748 descr: DE-IAV-20190409 admin-c: IAVI1-RIPE tech-c: IAVI1-RIPE notify: ripeadm [at] iav.de mnt-by: MAINT-AS12748 changed: kadir.andreas.mueller [at] iav.de 20231009 #09:40:50Z source: RADB last-modified: 2023-11-13T16:18:56Z rpki-ov-state: valid route: 5.183.20.0/22 origin: AS12748 org: ORG-IG153-RIPE notify: ripeadm [at] iav.de mnt-by: IAV-MNT created: 2023-04-03T15:42:23Z last-modified: 2023-04-03T15:42:23Z 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: 45.137.56.0/22 origin: AS12748 org: ORG-IG153-RIPE mnt-by: IAV-MNT created: 2021-11-25T21:49:06Z last-modified: 2021-11-25T21:49:06Z 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 route: 45.137.56.0/22 origin: AS12748 descr: DE-IAV-20190805 admin-c: IAVI1-RIPE tech-c: IAVI1-RIPE notify: ripeadm [at] iav.de mnt-by: MAINT-AS12748 changed: kadir.andreas.mueller [at] iav.de 20211125 #22:57:56Z source: RADB last-modified: 2023-11-13T16:08:56Z rpki-ov-state: valid route: 185.225.140.0/22 descr: DE-IAV-20171013 origin: AS12748 admin-c: IAVI1-RIPE tech-c: IAVI1-RIPE notify: ripeadm [at] iav.de mnt-by: MAINT-AS12748 changed: kadir.andreas.mueller [at] iav.de 20171116 #21:22:50Z source: RADB last-modified: 2023-11-13T15:52:36Z rpki-ov-state: valid route: 185.225.140.0/22 origin: AS12748 org: ORG-IG153-RIPE notify: ripeadm [at] iav.de mnt-by: IAV-MNT created: 2017-10-17T10:12:47Z last-modified: 2017-10-21T20:01:30Z 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: 193.104.216.0/24 descr: IAVGB2 origin: AS12748 admin-c: IAVI1-RIPE tech-c: IAVI1-RIPE notify: ripeadm [at] iav.de mnt-by: MAINT-AS12748 changed: kadir.andreas.mueller [at] iav.de 20171117 #13:26:05Z source: RADB last-modified: 2023-11-13T15:52:36Z rpki-ov-state: valid route: 193.104.216.0/24 notify: ripeadm [at] iav.de org: ORG-IG153-RIPE origin: AS12748 mnt-by: IAV-MNT created: 2010-01-07T13:35:07Z last-modified: 2017-10-21T20:02:16Z 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 route: 194.31.198.0/24 origin: AS12748 descr: IAVGB admin-c: IAVI1-RIPE tech-c: IAVI1-RIPE remarks: Please note that we route the lower /26 of this prefix to remarks: the European Network Exchange (ENX) and customers, while remarks: we use everything above that for internet services. remarks: Do not hesitate to contact us regarding routing questions. notify: ripeadm [at] iav.de mnt-by: MAINT-AS12748 changed: kadir.andreas.mueller [at] iav.de 20190516 #21:32:03Z source: RADB last-modified: 2023-11-13T15:56:11Z rpki-ov-state: valid route: 194.31.198.0/24 org: ORG-IG153-RIPE origin: AS12748 remarks: Please note that we route the lower /26 of this prefix to remarks: the European Network Exchange (ENX) and customers, while remarks: we use everything above that for internet services. remarks: Do not hesitate to contact us regarding routing questions. holes: 194.31.198.0/26 notify: ripeadm [at] iav.de mnt-by: IAV-MNT created: 2010-01-18T14:12:02Z last-modified: 2019-05-16T21:24:27Z 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: 2a0d:d400::/29 descr: DE-IAV-20171013 origin: AS12748 admin-c: IAVI1-RIPE tech-c: IAVI1-RIPE notify: ripeadm [at] iav.de mnt-by: MAINT-AS12748 changed: kadir.andreas.mueller [at] iav.de 20171116 #21:25:22Z source: RADB last-modified: 2023-11-13T15:52:36Z rpki-ov-state: valid route6: 2a0d:d400::/29 origin: AS12748 org: ORG-IG153-RIPE notify: ripeadm [at] iav.de mnt-by: IAV-MNT created: 2017-10-17T10:10:48Z last-modified: 2017-10-21T20:03:39Z 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: 2a0e:8c00::/29 origin: AS12748 descr: DE-IAV-20190409 admin-c: IAVI1-RIPE tech-c: IAVI1-RIPE notify: ripeadm [at] iav.de mnt-by: MAINT-AS12748 changed: kadir.andreas.mueller [at] iav.de 20231009 #09:45:17Z source: RADB last-modified: 2023-11-13T16:18:56Z rpki-ov-state: valid route6: 2a0e:8c00::/29 origin: AS12748 org: ORG-IG153-RIPE notify: ripeadm [at] iav.de mnt-by: IAV-MNT created: 2023-10-09T17:51:08Z last-modified: 2023-10-09T17:51:08Z 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