These entries are queried from radb.net using whois, you can try my project getting these.
:AS15301 route: 38.103.166.0/24 descr: Spectrum Networks proxy registration origin: AS15301 mnt-by: MAINT-AS11404 changed: john [at] vanoppen.com 20110511 #08:49:16Z source: RADB last-modified: 2023-11-13T15:51:16Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 52.129.64.0/19 descr: iovation Device Reputation Authority origin: AS15301 mnt-by: MNT-IOVAT changed: eric.rosenberry [at] iovation.com 20160815 source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 52.129.64.0/19 origin: AS15301 descr: iovation, inc. - Proxy Registration mnt-by: MAINT-AS11404 changed: tcrow [at] wavebroadband.com 20200605 #17:39:55Z source: RADB last-modified: 2023-11-13T16:00:54Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 74.121.28.0/22 descr: iovation Device Reputation Authority origin: AS15301 mnt-by: MNT-IOVAT changed: eric.rosenberry [at] iovation.com 20161116 source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 74.121.28.0/22 descr: proxy registration by AS11404 origin: AS15301 mnt-by: MAINT-AS11404 changed: john [at] vanoppen.com 20110430 #08:33:40Z source: RADB last-modified: 2023-11-13T15:51:16Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 74.121.28.0/23 descr: Proxy registration by AS11404 origin: AS15301 mnt-by: MAINT-AS11404 changed: john [at] vanoppen.com 20110430 #08:34:34Z source: RADB last-modified: 2023-11-13T15:51:16Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 74.121.28.0/24 origin: AS15301 descr: IO-74-121-28-0-1 admin-c: BOYDJ54-ARIN tech-c: BOYDJ54-ARIN tech-c: INO31-ARIN mnt-by: MNT-IOVAT created: 2022-11-14T15:31:56Z last-modified: 2024-04-23T16:14:49Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 74.121.29.0/24 origin: AS15301 descr: IO-74-121-29-0-1 admin-c: BOYDJ54-ARIN tech-c: BOYDJ54-ARIN tech-c: INO31-ARIN mnt-by: MNT-IOVAT created: 2022-12-15T17:38:41Z last-modified: 2024-04-23T16:14:49Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 74.121.31.0/24 descr: proxy registration by AS11404 origin: AS15301 mnt-by: MAINT-AS11404 changed: john [at] vanoppen.com 20110430 #08:36:01Z source: RADB last-modified: 2023-11-13T15:51:16Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 206.169.239.0/24 descr: iovation Device Reputation Authority origin: AS15301 mnt-by: MNT-IOVAT changed: eric.rosenberry [at] iovation.com 20161116 source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 206.169.239.0/24 descr: Spectrum Networks proxy registration origin: AS15301 mnt-by: MAINT-AS11404 changed: john [at] vanoppen.com 20110511 #08:50:33Z source: RADB last-modified: 2023-11-13T15:51:16Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 216.243.13.0/24 origin: AS15301 descr: iovation, inc. - Proxy Registration mnt-by: MAINT-AS11404 changed: cbuike [at] wavebroadband.com 20200605 #18:03:50Z source: RADB last-modified: 2023-11-13T16:00:54Z rpki-ov-state: valid route6: 2620:c8::/48 descr: Spectrum Networks proxy registration origin: AS15301 mnt-by: MAINT-AS11404 changed: john [at] vanoppen.com 20110430 #18:04:23Z source: RADB last-modified: 2023-11-13T15:51:16Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2620:10a:c000::/44 origin: AS15301 descr: iovation, inc - Proxy Registration mnt-by: MAINT-AS11404 changed: cbuike [at] wavebroadband.com 20200605 #18:13:28Z source: RADB last-modified: 2023-11-13T16:00:54Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2620:10a:c000::/44 descr: iovation Device Reputation Authority origin: AS15301 mnt-by: MNT-IOVAT changed: eric.rosenberry [at] iovation.com 20200212 source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source