These entries are queried from radb.net using whois, you can try my project getting these.
:AS21707 route: 8.14.180.0/24 descr: SLX route origin: AS21707 mnt-by: SLX-MNT changed: tj.dupree [at] level3.com 20070316 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 68.234.36.0/24 descr: RS-RC-ENDLESS MOUNTAINS HEALTH SYSTEMS-Upstate origin: AS21707 notify: publicipaddressing [at] charter.com mnt-by: MAINT-RR changed: publicipaddressing [at] charter.com 20190610 #23:11:51Z 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: 199.7.97.0/24 descr: Frontier Communications (ARIN OrgID: FRTR) origin: AS21707 remarks: remarks: -- Operational Contacts -- remarks: Abuse / UCE: abuse [at] support.ftr.com remarks: NOC / Maint: support [at] support.ftr.com remarks: BGP Routing: bgp [at] support.ftr.com remarks: remarks: Proxy-registered route object remarks: for Frontier BGP customer remarks: mnt-by: MAINT-AS5650 changed: april.strobel [at] ftr.com 20121219 source: RADB last-modified: 2024-02-15T15:38:55Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 204.27.202.0/24 descr: Student Loan Xpress, Inc. origin: AS21707 mnt-by: MAINT-SLX notify: networkteam [at] slxpress.com changed: networkteam [at] slxpress.com 20061214 source: ALTDB rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source