These entries are queried from radb.net using whois, you can try my project getting these.
:AS1852 route: 169.228.64.0/19 descr: University of California, UCNet origin: AS1852 notify: noc [at] ucnet.net notify: domaintech [at] ucop.edu mnt-by: MAINT-AS1852 changed: domaintech [at] ucop.edu 20000503 source: RADB last-modified: 2023-11-13T16:17:30Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 169.228.112.0/20 descr: University of California, UCNet origin: AS1852 notify: noc [at] ucnet.net notify: domaintech [at] ucop.edu mnt-by: MAINT-AS1852 changed: domaintech [at] ucop.edu 20000503 source: RADB last-modified: 2023-11-13T16:17:30Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 169.228.128.0/19 descr: University of California, UCNet origin: AS1852 notify: noc [at] ucnet.net notify: domaintech [at] ucop.edu mnt-by: MAINT-AS1852 changed: domaintech [at] ucop.edu 20000503 source: RADB last-modified: 2023-11-13T16:17:30Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 169.228.160.0/20 descr: University of California, UCNet origin: AS1852 notify: noc [at] ucnet.net notify: domaintech [at] ucop.edu mnt-by: MAINT-AS1852 changed: domaintech [at] ucop.edu 20000503 source: RADB last-modified: 2023-11-13T16:17:30Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 192.12.83.0/24 descr: UC Washington Center origin: AS1852 mnt-by: MAINT-AS1852 changed: rodger.rak [at] ucdc.edu 20040813 #19:17:33(UTC) source: RADB last-modified: 2023-11-13T16:17:30Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 192.35.215.0/24 descr: UC Wide Area Network Services University of California Office of the President Kaiser 3rd Floor, RM318 300 Lakeside Dr. Oakland CA 94612-3550, USA origin: AS1852 remarks: UCNet UCOP notify: noc [at] ucnet.net mnt-by: MAINT-AS1852 changed: john.hess [at] ucop.edu 19980702 source: RADB last-modified: 2023-11-13T16:17:30Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 192.35.216.0/24 descr: UC Wide Area Network Services University of California Office of the President Kaiser 3rd Floor, RM318 300 Lakeside Dr. Oakland CA 94612-3550, USA origin: AS1852 remarks: UCNet PtP Links notify: noc [at] ucnet.net mnt-by: MAINT-AS1852 changed: john.hess [at] ucop.edu 19980702 source: RADB last-modified: 2023-11-13T16:17:30Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 192.35.217.0/24 descr: UC Wide Area Network Services University of California Office of the President Kaiser 3rd Floor, RM318 300 Lakeside Dr. Oakland CA 94612-3550, USA origin: AS1852 remarks: UCNet interLATA SMDS notify: noc [at] ucnet.net mnt-by: MAINT-AS1852 changed: john.hess [at] ucop.edu 19980702 source: RADB last-modified: 2023-11-13T16:17:30Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 192.35.218.0/24 descr: UC Wide Area Network Services University of California Office of the President Kaiser 3rd Floor, RM318 300 Lakeside Dr. Oakland CA 94612-3550, USA origin: AS1852 remarks: UCNet OOB Access notify: noc [at] ucnet.net mnt-by: MAINT-AS1852 changed: john.hess [at] ucop.edu 19980702 source: RADB last-modified: 2023-11-13T16:17:30Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 192.35.219.0/24 descr: UC Wide Area Network Services University of California Office of the President Kaiser 3rd Floor, RM318 300 Lakeside Dr. Oakland CA 94612-3550, USA origin: AS1852 remarks: UCNet LATA-1 Networks notify: noc [at] ucnet.net mnt-by: MAINT-AS1852 changed: john.hess [at] ucop.edu 19980702 source: RADB last-modified: 2023-11-13T16:17:30Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 192.35.222.0/24 descr: UC Wide Area Network Services University of California Office of the President Kaiser 3rd Floor, RM318 300 Lakeside Dr. Oakland CA 94612-3550, USA origin: AS1852 remarks: UCNet CDL notify: noc [at] ucnet.net mnt-by: MAINT-AS1852 changed: john.hess [at] ucop.edu 19980702 source: RADB last-modified: 2023-11-13T16:17:30Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 192.35.224.0/23 descr: University of California, UCNet origin: AS1852 notify: noc [at] ucnet.net notify: domaintech [at] ucop.edu mnt-by: MAINT-AS1852 changed: domaintech [at] ucop.edu 20000720 source: RADB last-modified: 2023-11-13T16:17:30Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 192.35.224.0/24 descr: UC Wide Area Network Services University of California Office of the President Kaiser 3rd Floor, RM318 300 Lakeside Dr. Oakland CA 94612-3550, USA origin: AS1852 remarks: UCNet NOC and UCNet Access Services notify: noc [at] ucnet.net mnt-by: MAINT-AS1852 changed: john.hess [at] ucop.edu 19980702 source: RADB last-modified: 2023-11-13T16:17:30Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 192.35.226.0/24 descr: UC Wide Area Network Services University of California Office of the President Kaiser 3rd Floor, RM318 300 Lakeside Dr. Oakland CA 94612-3550, USA origin: AS1852 remarks: UCNet Access Services notify: noc [at] ucnet.net mnt-by: MAINT-AS1852 changed: john.hess [at] ucop.edu 19980702 source: RADB last-modified: 2023-11-13T16:17:30Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 192.35.227.0/24 descr: UC Wide Area Network Services University of California Office of the President Kaiser 3rd Floor, RM318 300 Lakeside Dr. Oakland CA 94612-3550, USA origin: AS1852 remarks: UCNet swamp /24 notify: noc [at] ucnet.net mnt-by: MAINT-AS1852 changed: john.hess [at] ucop.edu 19980702 source: RADB last-modified: 2023-11-13T16:17:30Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 192.35.228.0/24 descr: UC Wide Area Network Services University of California Office of the President Kaiser 3rd Floor, RM318 300 Lakeside Dr. Oakland CA 94612-3550, USA origin: AS1852 remarks: UCOP network hosted/advertised by UCSD for disaster recovery usage notify: noc [at] ucnet.net mnt-by: MAINT-AS1852 changed: john.hess [at] ucop.edu 19980702 changed: john.mccahon [at] ucop.edu 20061029 #05:01:03(UTC) source: RADB last-modified: 2023-11-13T16:17:30Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 198.175.158.0/24 descr: UCSF Medical Education Program, Fresno 2615 E. Clinton Ave Fresno CA 93703, USA origin: AS1852 remarks: UC Wide Area Networking Services notify: noc [at] ucnet.net notify: hossien [at] medisun.ucsfresno.edu mnt-by: MAINT-AS1852 changed: john.hess [at] ucop.edu 19980826 source: RADB last-modified: 2023-11-13T16:17:30Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source