These entries are queried from radb.net using whois, you can try my project getting these.
:AS13783 route: 137.45.0.0/16 descr: Radford University origin: AS13783 remarks: Radford University remarks: Originated by Radford University and advertised by Shentel notify: patrick.stevenson [at] emp.shentel.com mnt-by: MAINT-SHENTEL changed: patrick.stevenson [at] emp.shentel.com 20220803 source: NTTCOM last-modified: 2022-08-03T19:07:55Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 137.45.0.0/16 descr: Radford University origin: AS13783 mnt-by: MAINT-AS13783 changed: jcowger [at] runet.edu 20000105 source: RADB last-modified: 2023-11-13T15:39:36Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 137.45.0.0/20 origin: AS13783 descr: Proxy-registered route object mnt-by: MAINT-AS16942 changed: michaelherring [at] citizens.coop 20200609 #16:54:49Z source: RADB last-modified: 2023-11-13T16:00:58Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 137.45.14.0/23 descr: Proxy registered specific route for Radford University origin: AS13783 mnt-by: MAINT-AS7795 changed: fahnere [at] lumosnet.com 20140401 #18:31:53Z source: RADB last-modified: 2023-11-13T15:46:19Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 137.45.16.0/20 descr: Proxy registered specific route for Radford University origin: AS13783 mnt-by: MAINT-AS7795 changed: fahnere [at] lumosnet.com 20140401 #18:31:53Z source: RADB last-modified: 2023-11-13T15:46:19Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 137.45.32.0/20 origin: AS13783 descr: Proxy-registered route object mnt-by: MAINT-AS16942 changed: michaelherring [at] citizens.coop 20200609 #16:59:56Z source: RADB last-modified: 2023-11-13T16:00:58Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 137.45.44.0/23 descr: Proxy registered specific route for Radford University origin: AS13783 mnt-by: MAINT-AS7795 changed: fahnere [at] lumosnet.com 20140401 #18:31:53Z source: RADB last-modified: 2023-11-13T15:46:19Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 137.45.48.0/20 origin: AS13783 descr: Proxy-registered route object mnt-by: MAINT-AS16942 changed: michaelherring [at] citizens.coop 20200609 #17:00:49Z source: RADB last-modified: 2023-11-13T16:00:58Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 137.45.48.0/21 descr: proxy route for customer origin: AS13783 mnt-by: MAINT-AS7795 changed: fahnere [at] lumosnet.com 20140402 #16:34:46Z source: RADB last-modified: 2023-11-13T15:46:19Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 137.45.56.0/21 descr: proxy route for customer origin: AS13783 mnt-by: MAINT-AS7795 changed: fahnere [at] lumosnet.com 20140402 #16:34:46Z source: RADB last-modified: 2023-11-13T15:46:19Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 137.45.64.0/21 descr: proxy route for customer origin: AS13783 mnt-by: MAINT-AS7795 changed: fahnere [at] lumosnet.com 20140402 #16:34:46Z source: RADB last-modified: 2023-11-13T15:46:19Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 137.45.72.0/21 descr: proxy route for customer origin: AS13783 mnt-by: MAINT-AS7795 changed: fahnere [at] lumosnet.com 20140402 #16:34:46Z source: RADB last-modified: 2023-11-13T15:46:19Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 137.45.78.0/23 descr: Proxy registered specific route for Radford University origin: AS13783 mnt-by: MAINT-AS7795 changed: fahnere [at] lumosnet.com 20140401 #18:31:53Z source: RADB last-modified: 2023-11-13T15:46:19Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 137.45.80.0/20 descr: Proxy registered specific route for Radford University origin: AS13783 mnt-by: MAINT-AS7795 changed: fahnere [at] lumosnet.com 20140401 #18:31:53Z source: RADB last-modified: 2023-11-13T15:46:19Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 137.45.84.0/23 descr: Proxy registered specific route for Radford University origin: AS13783 mnt-by: MAINT-AS7795 changed: fahnere [at] lumosnet.com 20140401 #18:31:53Z source: RADB last-modified: 2023-11-13T15:46:19Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 137.45.88.0/23 descr: Proxy registered specific route for Radford University origin: AS13783 mnt-by: MAINT-AS7795 changed: fahnere [at] lumosnet.com 20140401 #18:31:53Z source: RADB last-modified: 2023-11-13T15:46:19Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 137.45.92.0/23 descr: Proxy registered specific route for Radford University origin: AS13783 mnt-by: MAINT-AS7795 changed: fahnere [at] lumosnet.com 20140401 #18:31:53Z source: RADB last-modified: 2023-11-13T15:46:19Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 137.45.112.0/20 descr: Proxy registered specific route for Radford University origin: AS13783 mnt-by: MAINT-AS7795 changed: fahnere [at] lumosnet.com 20140401 #18:31:53Z source: RADB last-modified: 2023-11-13T15:46:19Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 137.45.120.0/23 descr: Proxy registered specific route for Radford University origin: AS13783 mnt-by: MAINT-AS7795 changed: fahnere [at] lumosnet.com 20140401 #18:31:53Z source: RADB last-modified: 2023-11-13T15:46:19Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 137.45.144.0/20 descr: Proxy registered specific route for Radford University origin: AS13783 mnt-by: MAINT-AS7795 changed: fahnere [at] lumosnet.com 20140401 #18:31:53Z source: RADB last-modified: 2023-11-13T15:46:19Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 137.45.160.0/20 descr: Proxy registered specific route for Radford University origin: AS13783 mnt-by: MAINT-AS7795 changed: fahnere [at] lumosnet.com 20140401 #18:31:53Z source: RADB last-modified: 2023-11-13T15:46:19Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 137.45.176.0/20 descr: proxy route for customer origin: AS13783 mnt-by: MAINT-AS7795 changed: fahnere [at] lumosnet.com 20140402 #16:34:46Z source: RADB last-modified: 2023-11-13T15:46:19Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 137.45.204.0/23 descr: Proxy registered specific route for Radford University origin: AS13783 mnt-by: MAINT-AS7795 changed: fahnere [at] lumosnet.com 20140401 #18:31:53Z source: RADB last-modified: 2023-11-13T15:46:19Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 137.45.208.0/20 descr: Proxy registered specific route for Radford University origin: AS13783 mnt-by: MAINT-AS7795 changed: fahnere [at] lumosnet.com 20140401 #18:31:53Z source: RADB last-modified: 2023-11-13T15:46:19Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 137.45.208.0/23 descr: Proxy registered specific route for Radford University origin: AS13783 mnt-by: MAINT-AS7795 changed: fahnere [at] lumosnet.com 20140401 #18:31:53Z source: RADB last-modified: 2023-11-13T15:46:19Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 137.45.224.0/20 origin: AS13783 descr: Proxy-registered route object mnt-by: MAINT-AS16942 changed: michaelherring [at] citizens.coop 20200609 #16:58:50Z source: RADB last-modified: 2023-11-13T16:00:58Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 137.45.232.0/23 descr: Proxy registered specific route for Radford University origin: AS13783 mnt-by: MAINT-AS7795 changed: fahnere [at] lumosnet.com 20140401 #18:31:53Z source: RADB last-modified: 2023-11-13T15:46:19Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 137.45.240.0/20 descr: Proxy registered specific route for Radford University origin: AS13783 mnt-by: MAINT-AS7795 changed: fahnere [at] lumosnet.com 20140401 #18:31:53Z source: RADB last-modified: 2023-11-13T15:46:19Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 137.45.244.0/23 descr: Proxy registered specific route for Radford University origin: AS13783 mnt-by: MAINT-AS7795 changed: fahnere [at] lumosnet.com 20140401 #18:31:53Z source: RADB last-modified: 2023-11-13T15:46:19Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source