These entries are queried from radb.net using whois, you can try my project getting these.
:AS2552 route: 65.254.96.0/19 origin: AS2552 descr: Saint Louis Internet2 Access Consortium (SLIAC) IPv4 mnt-by: MNT-SLIACL changed: jmarentette [at] wustl.edu 20190911 notify: jmarentette [at] wustl.edu source: ARIN rpki-ov-state: valid route: 65.254.109.0/24 origin: AS2552 descr: Saint Louis Internet2 Access Consortium (SLIAC) Subnet mnt-by: MNT-SLIACL changed: jmarentette [at] wustl.edu 20190911 notify: jmarentette [at] wustl.edu source: ARIN rpki-ov-state: valid route: 128.25.0.0/16 descr: RR-RC-Washington University SC-Central origin: AS2552 admin-c: IPADDREG tech-c: IPADDREG notify: publicipaddressing [at] charter.com mnt-by: MAINT-RR changed: publicipaddressing [at] charter.com 20200327 #16:41:18Z source: RADB last-modified: 2023-11-13T16:15:19Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 128.252.0.0/16 descr: Proxy-registered route object origin: AS2552 remarks: auto-generated route object remarks: this next line gives the robot something to recognize remarks: L'enfer, c'est les autres remarks: remarks: This route object is for a Level 3 customer route remarks: which is being exported under this origin AS. remarks: remarks: This route object was created because no existing remarks: route object with the same origin was found, and remarks: since some Level 3 peers filter based on these objects remarks: this route may be rejected if this object is not created. remarks: remarks: Please contact dl-routing [at] lumen.com if you have any remarks: questions regarding this object. mnt-by: LEVEL3-MNT changed: joseph.nieto [at] level3.com 20181214 source: LEVEL3 rpki-ov-state: valid route: 128.252.0.0/16 descr: proxy entry for Washington University in St Louis origin: AS2552 mnt-by: MAINT-CHTR-WD changed: nicholas.etnoyer [at] charter.com 20181119 #17:17:22Z source: RADB last-modified: 2023-11-13T16:11:26Z rpki-ov-state: valid route: 128.252.0.0/16 origin: AS2552 descr: WUSTL IPv4 descr: Washington University in Saint Louis descr: 1 Brookings Drive descr: Saint Louis, MO 63130 descr: US mnt-by: MNT-WASHIN-Z changed: jmarentette [at] wustl.edu 20181016 notify: jmarentette [at] wustl.edu source: ARIN rpki-ov-state: valid route: 128.252.25.0/24 origin: AS2552 descr: WUSTL IPv4 Subnet descr: Washington University in Saint Louis descr: 1 Brookings Drive descr: Saint Louis, MO 63130 descr: US mnt-by: MNT-WASHIN-Z changed: jmarentette [at] wustl.edu 20190910 notify: jmarentette [at] wustl.edu source: ARIN rpki-ov-state: valid route: 128.252.48.0/24 origin: AS2552 descr: WUSTL IPv4 Subnet descr: Washington University in Saint Louis descr: 1 Brookings Drive descr: Saint Louis, MO 63130 descr: US mnt-by: MNT-WASHIN-Z changed: jmarentette [at] wustl.edu 20190910 notify: jmarentette [at] wustl.edu source: ARIN rpki-ov-state: valid route: 128.252.182.0/24 origin: AS2552 descr: WUSTL IPv4 Subnet descr: Washington University in Saint Louis descr: 1 Brookings Drive descr: Saint Louis, MO 63130 descr: US mnt-by: MNT-WASHIN-Z changed: jmarentette [at] wustl.edu 20190911 notify: jmarentette [at] wustl.edu source: ARIN rpki-ov-state: valid route: 192.31.46.0/24 descr: RR-RC-Washington University SC-Central origin: AS2552 admin-c: IPADDREG tech-c: IPADDREG notify: publicipaddressing [at] charter.com mnt-by: MAINT-RR changed: publicipaddressing [at] charter.com 20200327 #16:41:18Z source: RADB last-modified: 2023-11-13T16:15:19Z rpki-ov-state: valid route: 192.31.46.0/24 origin: AS2552 descr: WUSTL IPv4 LFU-ETHER descr: Washington University in Saint Louis descr: 1 Brookings Drive descr: Saint Louis, MO 63130 descr: US mnt-by: MNT-WASHIN-Z changed: jmarentette [at] wustl.edu 20181016 notify: jmarentette [at] wustl.edu source: ARIN rpki-ov-state: valid route6: 2604:3e00::/32 descr: Washington University, St Louis origin: AS2552 remarks: Washington University, St Louis remarks: contact noc [at] indiana.gigapop.net if you have questions about this object. remarks: abuse contact is abuse [at] indiana.edu. mnt-by: MAINT-IU changed: wtjohnso [at] globalnoc.iu.edu 20180409 #00:18:56Z source: RADB last-modified: 2023-11-13T15:53:23Z rpki-ov-state: valid route6: 2606:fd80::/32 origin: AS2552 descr: Saint Louis Internet2 Access Consortium (SLIAC) IPv6 mnt-by: MNT-SLIACL changed: jmarentette [at] wustl.edu 20190911 notify: jmarentette [at] wustl.edu source: ARIN rpki-ov-state: valid route6: 2606:fd80::/32 descr: Washington University, St Louis origin: AS2552 remarks: Washington University, St Louis remarks: contact noc [at] indiana.gigapop.net if you have questions about this object. remarks: abuse contact is abuse [at] indiana.edu. mnt-by: MAINT-IU changed: wtjohnso [at] globalnoc.iu.edu 20180409 #00:19:48Z source: RADB last-modified: 2023-11-13T15:53:23Z rpki-ov-state: valid