These entries are queried from radb.net using whois, you can try my project getting these.
:AS3562 route: 134.252.0.0/16 descr: SNL-NETC Sandia National Laboratories Livermore, CA 94551-0969 US origin: AS3562 mnt-by: MAINT-ESNET changed: yhines [at] es.net 20090707 source: RADB last-modified: 2023-11-13T15:40:00Z rpki-ov-state: valid route: 146.246.0.0/16 descr: SNL-NETF Sandia National Laboratories Livermore, CA 94551-0969 US origin: AS3562 mnt-by: MAINT-ESNET changed: yhines [at] es.net 20090707 source: RADB last-modified: 2023-11-13T15:40:00Z rpki-ov-state: valid route: 192.73.207.0/24 descr: Sandia National Laboratories PO Box 5800 Albuquerque NM 87185 USA origin: AS3562 mnt-by: MAINT-ESNET changed: dwcarder [at] es.net 20180911 #19:41:37Z source: RADB last-modified: 2023-11-13T15:54:41Z rpki-ov-state: valid route: 192.73.207.0/24 descr: Sandia National Laboratories (Livermore) origin: AS3562 notify: adajaco [at] sandia.gov mnt-by: MNT-SNL-3 changed: adajaco [at] sandia.gov 20190506 source: ARIN rpki-ov-state: valid route: 192.73.208.0/24 origin: AS3562 descr: Sandia National Laboratories (Livermore) PO Box 969 Livermore CA mnt-by: MAINT-ESNET changed: hostmaster [at] es.net 20220329 #15:34:24Z source: RADB last-modified: 2023-11-13T16:10:14Z rpki-ov-state: valid route: 192.160.228.0/24 descr: SNL-NETG Sandia National Laboratories Livermore, CA 94551-0969 US origin: AS3562 mnt-by: MAINT-ESNET changed: yhines [at] es.net 20090707 source: RADB last-modified: 2023-11-13T15:40:00Z rpki-ov-state: valid route: 198.206.219.0/24 descr: SNL-NETH Sandia National Laboratories Livermore, CA 94551-0969 US origin: AS3562 mnt-by: MAINT-ESNET changed: yhines [at] es.net 20090707 source: RADB last-modified: 2023-11-13T15:40:00Z rpki-ov-state: valid route: 198.206.221.0/24 descr: SNL-NETH Sandia National Laboratories Livermore, CA 94551-0969 US origin: AS3562 mnt-by: MAINT-ESNET changed: hostmaster [at] es.net 20120801 #18:47:22Z source: RADB last-modified: 2023-11-13T15:43:21Z rpki-ov-state: valid route: 204.238.65.0/24 descr: SNL-NETJ Sandia National Laboratories Livermore, CA 94551-0969 US origin: AS3562 mnt-by: MAINT-ESNET changed: yhines [at] es.net 20090707 source: RADB last-modified: 2023-11-13T15:40:00Z rpki-ov-state: valid route6: 2620:106:6000::/44 origin: AS3562 descr: Sandia National Laboratories Livermore, CA 94551-0969 US mnt-by: MAINT-ESNET changed: hostmaster [at] es.net 20181220 #21:58:06Z source: RADB last-modified: 2023-11-13T15:55:22Z rpki-ov-state: valid route6: 2620:106:6000::/44 descr: Sandia National Laboratories (Livermore) origin: AS3562 notify: adajaco [at] sandia.gov mnt-by: MNT-SNL-3 changed: adajaco [at] sandia.gov 20190506 source: ARIN rpki-ov-state: valid route6: 2620:106:6000::/48 descr: Sandia National Laboratories Livermore, CA 94551-0969 US origin: AS3562 mnt-by: MAINT-ESNET changed: hostmaster [at] es.net 20110912 #22:59:21Z source: RADB last-modified: 2023-11-13T15:41:35Z rpki-ov-state: valid