These entries are queried from radb.net using whois, you can try my project getting these.
:AS3390 route: 134.193.0.0/16 descr: UMKCnet University of Missouri-Kansas City Networking/Telecommunications Newcomb Hall 5123 Holmes Ave. Kansas City, MO 64110 USA origin: AS3390 remarks: UMKC's primary address range notify: UMKCnetop [at] umkc.edu mnt-by: MAINT-AS3390 changed: johnstond [at] umkc.edu 20110915 #18:21:35Z source: RADB last-modified: 2023-11-13T15:41:36Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 204.56.0.0/21 descr: University of Missouri-Kansas City 5100 Rockhill Road Kansas City, MO 64110 USA origin: AS3390 remarks: UMKC affiliates notify: UMKCnetop [at] umkc.edu mnt-by: MAINT-AS3390 changed: johnstond [at] umkc.edu 20110915 #18:21:09Z source: RADB last-modified: 2023-11-13T15:41:36Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 204.76.182.0/23 descr: UMKC Affiliate 5100 Rockhill Road Kansas City, MO 64110 USA origin: AS3390 remarks: UMKC affiliate notify: UMKCnetop [at] umkc.edu mnt-by: MAINT-AS3390 changed: johnstond [at] umkc.edu 20110915 #18:14:32Z source: RADB last-modified: 2023-11-13T15:41:36Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 204.76.184.0/22 descr: UMKC affiliate 5100 Rockhill Road Kansas City, MO 64110 USA origin: AS3390 remarks: UMKC affiliate notify: UMKCnetop [at] umkc.edu mnt-by: MAINT-AS3390 changed: johnstond [at] umkc.edu 20110915 #18:15:50Z source: RADB last-modified: 2023-11-13T15:41:36Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 204.76.188.0/23 descr: UMKC Affiliate 5100 Rockhill Road Kansas City, MO 64110 USA origin: AS3390 remarks: UMKC Affiliate notify: UMKCnetop [at] umkc.edu mnt-by: MAINT-AS3390 changed: johnstond [at] umkc.edu 20110915 #18:17:44Z source: RADB last-modified: 2023-11-13T15:41:36Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2610:e0:a040::/44 origin: AS3390 descr: University of Missouri Inter-Campus Network mnt-by: MAINT-AS2572 changed: noc [at] more.net 20190701 #19:14:34Z source: RADB last-modified: 2023-11-13T15:56:41Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source