These entries are queried from radb.net using whois, you can try my project getting these.
:AS54297 route: 192.33.240.0/24 origin: AS54297 descr: Savannah River Plant (SRP-1) Savannah River Site Aiken, SC 29808 mnt-by: MAINT-ESNET changed: hostmaster [at] es.net 20220329 #15:23:26Z source: RADB last-modified: 2023-11-13T16:10:14Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2620:b0:8000::/48 origin: AS54297 descr: Savannah River Site Aiken SC 29808 United States admin-c: MCMUR131-ARIN tech-c: WAR15-ARIN mnt-by: MNT-SRP-1 created: 2022-03-28T12:06:41Z last-modified: 2022-03-30T19:53:17Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2620:b0:8000::/48 descr: Savannah River Plant (SRP-1) Savannah River Site Aiken, SC 29808 origin: AS54297 mnt-by: MAINT-ESNET changed: dwcarder [at] es.net 20180718 #19:53:12Z source: RADB last-modified: 2023-11-13T15:54:04Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source