These entries are queried from radb.net using whois, you can try my project getting these.
:AS32720 route: 146.184.0.0/24 descr: Canon USA Internet Class B origin: AS32720 mnt-by: MAINT-AS32720 changed: kmohamed [at] cusa.canon.com 20130508 #14:01:26Z source: RADB last-modified: 2023-11-13T15:45:25Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 146.184.6.0/24 descr: Canon USA Internet origin: AS32720 mnt-by: MAINT-AS32720 changed: kmohamed [at] cusa.canon.com 20130508 #14:01:52Z source: RADB last-modified: 2023-11-13T15:45:25Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 146.184.122.0/24 descr: Added on behalf of the customer origin: AS32720 mnt-by: MAINT-AS812 changed: ismaeldomaoan [at] rci.rogers.com 20160219 #23:08:10Z source: RADB last-modified: 2023-11-13T15:48:45Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 146.184.123.0/24 descr: Added on behalf of the customer origin: AS32720 mnt-by: MAINT-AS812 changed: ismaeldomaoan [at] rci.rogers.com 20160219 #23:08:47Z source: RADB last-modified: 2023-11-13T15:48:45Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 146.184.152.0/22 descr: Canon USA origin: AS32720 remarks: Proxy Objects for Canon notify: bgp [at] gnilink.net mnt-by: MAINT-NTTCOM-RA changed: chowser [at] us.ntt.net 20180821 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 146.184.152.0/22 descr: Canon USA Sterling VA origin: AS32720 mnt-by: MAINT-AS32720 changed: techcontact [at] cusa.canon.com 20060428 #19:07:32(UTC) source: RADB last-modified: 2023-11-13T15:40:00Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 146.184.155.0/24 descr: Canon USA origin: AS32720 remarks: Proxy Objects for Canon notify: bgp [at] gnilink.net mnt-by: MAINT-NTTCOM-RA changed: chowser [at] us.ntt.net 20180821 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 146.184.155.0/24 descr: Canon USA Internet Sterling VA origin: AS32720 mnt-by: MAINT-AS32720 changed: uribarri [at] alum.mit.edu 20060518 #15:16:29(UTC) changed: ghatt [at] cusa.canon.com 20061024 #14:29:05(UTC) source: RADB last-modified: 2023-11-13T15:40:00Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 146.184.156.0/24 descr: Canon USA Sterling VA origin: AS32720 mnt-by: MAINT-AS32720 changed: uribarri [at] alum.mit.edu 20060511 #14:38:52(UTC) source: RADB last-modified: 2023-11-13T15:40:00Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 146.184.156.0/24 descr: Canon USA origin: AS32720 remarks: Proxy Objects for Canon notify: bgp [at] gnilink.net mnt-by: MAINT-NTTCOM-RA changed: chowser [at] us.ntt.net 20180821 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 146.184.160.0/20 descr: Canon USA Internet origin: AS32720 mnt-by: MAINT-AS32720 changed: kmohamed [at] cusa.canon.com 20130508 #14:02:18Z source: RADB last-modified: 2023-11-13T15:45:25Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 146.184.160.0/24 descr: Canon USA Internet origin: AS32720 mnt-by: MAINT-AS32720 changed: kmohamed [at] cusa.canon.com 20130508 #14:02:37Z source: RADB last-modified: 2023-11-13T15:45:25Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 146.184.161.0/24 descr: Canon USA Internet origin: AS32720 mnt-by: MAINT-AS32720 changed: kmohamed [at] cusa.canon.com 20130508 #14:02:56Z source: RADB last-modified: 2023-11-13T15:45:25Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 146.184.162.0/24 descr: Canon USA Internet origin: AS32720 mnt-by: MAINT-AS32720 changed: kmohamed [at] cusa.canon.com 20130508 #14:03:12Z source: RADB last-modified: 2023-11-13T15:45:25Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 146.184.163.0/24 descr: Canon USA Internet origin: AS32720 mnt-by: MAINT-AS32720 changed: kmohamed [at] cusa.canon.com 20130508 #14:03:28Z source: RADB last-modified: 2023-11-13T15:45:25Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 146.184.164.0/24 descr: Canon USA Internet origin: AS32720 mnt-by: MAINT-AS32720 changed: kmohamed [at] cusa.canon.com 20130508 #14:03:43Z source: RADB last-modified: 2023-11-13T15:45:25Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 146.184.165.0/24 descr: Canon USA Internet origin: AS32720 mnt-by: MAINT-AS32720 changed: kmohamed [at] cusa.canon.com 20130508 #14:04:23Z source: RADB last-modified: 2023-11-13T15:45:25Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 146.184.166.0/24 descr: Canon USA Internet origin: AS32720 mnt-by: MAINT-AS32720 changed: kmohamed [at] cusa.canon.com 20130508 #14:04:39Z source: RADB last-modified: 2023-11-13T15:45:25Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 146.184.167.0/24 descr: Canon USA Internet origin: AS32720 mnt-by: MAINT-AS32720 changed: kmohamed [at] cusa.canon.com 20130508 #14:04:54Z source: RADB last-modified: 2023-11-13T15:45:25Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 146.184.175.0/24 descr: Canon USA Internet origin: AS32720 mnt-by: MAINT-AS32720 changed: kmohamed [at] cusa.canon.com 20130508 #14:05:14Z source: RADB last-modified: 2023-11-13T15:45:25Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source