These entries are queried from radb.net using whois, you can try my project getting these.
:AS20404 route: 158.81.153.0/24 descr: NRG Energy, Inc. origin: AS20404 mnt-by: MAINT-AS27506 changed: robert.hinst [at] crowncastle.com 20190214 #19:39:41Z source: RADB last-modified: 2023-11-13T15:55:41Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 158.81.208.0/22 descr: NRG Energy, Inc. origin: AS20404 mnt-by: MAINT-AS27506 changed: robert.hinst [at] crowncastle.com 20190227 source: RADB last-modified: 2023-11-13T15:55:42Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 158.81.208.0/23 descr: nrg route object origin: AS20404 mnt-by: MAINT-AS55002 changed: netops [at] defense.net 20161219 #22:16:10Z source: RADB last-modified: 2023-11-13T15:50:11Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 158.81.210.0/23 descr: nrg route object origin: AS20404 mnt-by: MAINT-AS55002 changed: netops [at] defense.net 20161219 #21:58:32Z source: RADB last-modified: 2023-11-13T15:50:11Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source