These entries are queried from radb.net using whois, you can try my project getting these.
:AS31862 route: 50.49.252.0/24 descr: Complemar Partners origin: AS31862 mnt-by: MAINT-AS27506 changed: rhinst [at] lightower.com 20160902 #18:57:08Z source: RADB last-modified: 2023-11-13T15:49:51Z rpki-ov-state: valid route: 199.255.136.0/22 descr: Hickory, NC Dacentec origin: AS31862 mnt-by: MAINT-CHTR-WD changed: denny.derda [at] chartercom.com 20100610 #15:32:16Z source: RADB last-modified: 2023-11-13T16:11:25Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 199.255.156.0/22 descr: Hickory, NC Dacentec origin: AS31862 mnt-by: MAINT-CHTR-WD changed: denny.derda [at] chartercom.com 20100610 #15:33:03Z source: RADB last-modified: 2023-11-13T16:11:25Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 206.104.54.0/24 descr: Spectrum Networks customer route origin: AS31862 mnt-by: MAINT-AS11404 changed: john [at] vanoppen.com 20070824 #05:26:47(UTC) source: RADB last-modified: 2023-11-13T15:51:16Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source