These entries are queried from radb.net using whois, you can try my project getting these.
:AS73 route: 69.91.128.0/17 descr: UW-SEATTLE-06 University of Washington Computing & Communications Networks and Distributed Computing Seattle WA 98105-4527 USA origin: AS73 mnt-by: MAINT-AS73 changed: amelc [at] cac.washington.edu 20060109 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: 69.91.192.0/18 descr: UW-SEATTLE-06 University of Washington UW Information Technology Seattle WA 98105-4527 USA origin: AS73 mnt-by: MAINT-AS73 changed: johngh [at] uw.edu 20220902 source: RADB last-modified: 2023-11-13T16:12:25Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 108.179.128.0/18 descr: UW-SEATTLE-08 University of Washington Computing & Communications Networks and Distributed Computing Seattle WA 98105-4527 USA origin: AS73 mnt-by: MAINT-AS73 changed: johngh [at] cac.washington.edu 20120522 source: RADB last-modified: 2023-11-13T15:42:43Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 128.95.0.0/16 descr: WASHINGTON University of Washington Computing & Communications Networks and Distributed Computing Seattle WA 98105-4527 USA origin: AS73 mnt-by: MAINT-AS73 changed: amarashi [at] cac.washington.edu 19990201 source: RADB last-modified: 2023-11-13T15:39:32Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 128.208.0.0/16 descr: WASH-NSF University of Washington Computing & Communications Networks and Distributed Computing Seattle WA 98105-4527 USA origin: AS73 mnt-by: MAINT-AS73 changed: amarashi [at] cac.washington.edu 19990201 source: RADB last-modified: 2023-11-13T15:39:32Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 140.142.0.0/16 descr: UW-SEA University of Washington Computing & Communications Networks and Distributed Computing Seattle WA 98105-4527 USA origin: AS73 mnt-by: MAINT-AS73 changed: amarashi [at] cac.washington.edu 19990201 source: RADB last-modified: 2023-11-13T15:39:32Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 173.250.128.0/17 descr: UW-SEATTLE-07 University of Washington Computing & Communications Networks and Distributed Computing Seattle WA 98105-4527 USA origin: AS73 mnt-by: MAINT-AS73 changed: amelc [at] cac.washington.edu 20100611 source: RADB last-modified: 2023-11-13T15:40:58Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 173.250.128.0/18 descr: UW-SEATTLE-07 University of Washington Computing & Communications Networks and Distributed Computing Seattle WA 98105-4527 USA origin: AS73 mnt-by: MAINT-AS73 changed: dsinn [at] uw.edu 20221017 source: RADB last-modified: 2023-11-13T16:12:45Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 173.250.232.0/21 descr: UW-SEATTLE-07 University of Washington Computing & Communications Networks and Distributed Computing Seattle WA 98105-4527 USA origin: AS73 mnt-by: MAINT-AS73 changed: dsinn [at] uw.edu 20221017 source: RADB last-modified: 2023-11-13T16:12:45Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 192.26.136.0/24 descr: UW-SEA University of Washington Computing & Communications Networks and Distributed Computing Seattle WA 98105-4527 USA origin: AS73 mnt-by: MAINT-AS73 changed: dmcgaugh [at] cac.washington.edu 20051209 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: 192.42.144.0/24 descr: UW-SEATTLE-12 University of Washington Computing & Communications Networks and Distributed Computing Seattle WA 98105-4527 USA origin: AS73 mnt-by: MAINT-AS73 changed: willu [at] uw.edu 20171229 source: RADB last-modified: 2023-11-13T15:52:43Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 198.48.64.0/19 descr: University of Washington Computing & Communications Networks and Distributed Computing Seattle WA 98105-4527 USA origin: AS73 mnt-by: MAINT-AS73 changed: amarashi [at] cac.washington.edu 19990201 source: RADB last-modified: 2023-11-13T15:39:32Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 204.69.8.0/21 descr: UW-NWSEA-01 University of Washington Computing & Communications Networks and Distributed Computing Seattle WA 98105-4527 USA origin: AS73 mnt-by: MAINT-AS73 changed: johngh [at] uw.edu 20150519 source: RADB last-modified: 2023-11-13T15:47:27Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 204.69.15.0/24 descr: UW-NWSEA-02 University of Washington Computing & Communications Networks and Distributed Computing Seattle WA 98105-4527 USA origin: AS73 mnt-by: MAINT-AS73 changed: johngh [at] uw.edu 20150519 source: RADB last-modified: 2023-11-13T15:47:27Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 205.175.96.0/19 descr: UW-SEA-BLK2 University of Washington Computing & Communications Networks and Distributed Computing Seattle WA 98105-4527 USA origin: AS73 mnt-by: MAINT-AS73 changed: amarashi [at] cac.washington.edu 19990201 source: RADB last-modified: 2023-11-13T15:39:32Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2607:4000::/32 descr: UW-SEATTLE-IPV6-01 University of Washington 4545 15th Ave NE Seattle WA 98105-4527 USA origin: AS73 mnt-by: MAINT-AS73 changed: schylerb [at] u.washington.edu 20100527 source: RADB last-modified: 2023-11-13T15:40:58Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source