These entries are queried from radb.net using whois, you can try my project getting these.
:AS20252 route: 140.251.0.0/17 origin: AS20252 descr: Proxy registration for the Joan & Sanford I. Weill Medical College of Cornell University admin-c: William Owens tech-c: NYSERNet NOC remarks: This is a proxy registration by NYSERNet on behalf of one of our member campuses. For changes or removal, contact noc [at] nysernet.org notify: noc [at] nysernet.org notify: ncsg [at] med.cornell.edu mnt-by: MAINT-AS3754 changed: owens [at] nysernet.org 20190916 #21:12:12Z source: RADB last-modified: 2023-11-13T15:57:26Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 157.139.0.0/16 origin: AS20252 descr: Proxy registration for the Joan & Sanford I. Weill Medical College of Cornell University admin-c: William Owens tech-c: NYSERNet NOC remarks: This is a proxy registration by NYSERNet on behalf of one of our member campuses. For changes or removal, contact noc [at] nysernet.org notify: noc [at] nysernet.org notify: ncsg [at] med.cornell.edu mnt-by: MAINT-AS3754 changed: owens [at] nysernet.org 20190916 #21:14:10Z source: RADB last-modified: 2023-11-13T15:57:26Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 198.160.246.0/24 descr: Cornell University-AS20252(added by MAINT-AS3257) origin: AS20252 remarks: ------------------------------------------------ remarks: - This route object was registered by - remarks: - Yipes Enterprise Services MAINT-AS3257 - remarks: - on behalf of their customer: - remarks: - Cornell University AS20252 in NYC - remarks: ------------------------------------------------ notify: netguard [at] gtt.net mnt-by: MAINT-AS3257 changed: jyounker [at] yipes.com 20030226 changed: netguard [at] gtt.net 20180615 source: RADB last-modified: 2023-11-13T15:53:48Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 198.177.191.0/24 descr: Cornell University-AS20252(added by MAINT-AS3257) origin: AS20252 remarks: ------------------------------------------------ remarks: - This route object was registered by - remarks: - Yipes Enterprise Services MAINT-AS3257 - remarks: - on behalf of their customer: - remarks: - Cornell University AS20252 in NYC - remarks: ------------------------------------------------ notify: netguard [at] gtt.net mnt-by: MAINT-AS3257 changed: jyounker [at] yipes.com 20030226 changed: netguard [at] gtt.net 20180615 source: RADB last-modified: 2023-11-13T15:53:48Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 198.177.192.0/22 descr: Cornell University-AS20252(added by MAINT-AS3257) origin: AS20252 remarks: ------------------------------------------------ remarks: - This route object was registered by - remarks: - Yipes Enterprise Services MAINT-AS3257 - remarks: - on behalf of their customer: - remarks: - Cornell University AS20252 in NYC - remarks: ------------------------------------------------ notify: netguard [at] gtt.net mnt-by: MAINT-AS3257 changed: jyounker [at] yipes.com 20030226 changed: netguard [at] gtt.net 20180615 source: RADB last-modified: 2023-11-13T15:53:48Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 198.177.196.0/23 descr: Cornell University-AS20252(added by MAINT-AS3257) origin: AS20252 remarks: ------------------------------------------------ remarks: - This route object was registered by - remarks: - Yipes Enterprise Services MAINT-AS3257 - remarks: - on behalf of their customer: - remarks: - Cornell University AS20252 in NYC - remarks: ------------------------------------------------ notify: netguard [at] gtt.net mnt-by: MAINT-AS3257 changed: jyounker [at] yipes.com 20030226 changed: netguard [at] gtt.net 20180615 source: RADB last-modified: 2023-11-13T15:53:48Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 207.162.240.0/20 descr: Weill Cornell Medical Center origin: AS20252 mnt-by: MAINT-AS27506 changed: nicholas.noda [at] crowncastle.com 20230314 source: RADB last-modified: 2023-11-13T16:15:24Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 207.162.253.0/24 descr: Weill Cornell Medical Center origin: AS20252 mnt-by: MAINT-AS27506 changed: nicholas.noda [at] crowncastle.com 20230228 source: RADB last-modified: 2023-11-13T16:15:21Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source