These entries are queried from radb.net using whois, you can try my project getting these.
:AS53498 route: 199.255.152.0/22 descr: FordFoundation origin: AS53498 notify: noc [at] rackspace.com mnt-by: MAINT-AS10532 changed: chris.hansell [at] rackspace.com 20180720 #18:04:48Z source: RADB last-modified: 2023-11-13T16:05:07Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 199.255.152.0/23 descr: 199.255.152.0/23 origin: AS53498 remarks: Registered by Datapipe on behalf of The Ford Foundation. mnt-by: MAINT-AS14492 changed: hostmaster [at] datapipe.com 20100906 #21:16:24Z source: RADB last-modified: 2023-11-13T15:41:00Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 199.255.152.0/24 descr: FORD FOUNDATION origin: AS53498 mnt-by: MAINT-AS27506 changed: rdavis [at] lightower.com 20160624 source: RADB last-modified: 2023-11-13T15:49:33Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 199.255.153.0/24 descr: Ford Foundation origin: AS53498 mnt-by: MAINT-AS27506 changed: jmcnallie [at] lightower.com 20160912 source: RADB last-modified: 2023-11-13T15:49:52Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 199.255.154.0/23 descr: sidera cust origin: AS53498 mnt-by: MAINT-AS27506 changed: hicham.kassabi [at] sidera.net 20120816 #19:45:50Z source: RADB last-modified: 2023-11-13T15:43:22Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source