These entries are queried from radb.net using whois, you can try my project getting these.
:AS62882 route: 146.214.8.0/21 descr: Proxy Entry for Mallinckrodt LLC AS62882 origin: AS62882 mnt-by: MAINT-CHTR-WD changed: james.graves [at] chartercom.com 20131106 #03:06:01Z source: RADB last-modified: 2023-11-13T16:11:26Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 146.214.16.0/20 descr: Proxy Entry for Mallinckrodt LLC AS62882 origin: AS62882 mnt-by: MAINT-CHTR-WD changed: james.graves [at] chartercom.com 20131106 #03:07:18Z source: RADB last-modified: 2023-11-13T16:11:26Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 146.214.32.0/19 descr: Proxy Entry for Mallinckrodt LLC AS62882 origin: AS62882 mnt-by: MAINT-CHTR-WD changed: james.graves [at] chartercom.com 20131106 #03:07:43Z source: RADB last-modified: 2023-11-13T16:11:26Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 146.214.64.0/18 descr: Proxy Entry for Mallinckrodt LLC AS62882 origin: AS62882 mnt-by: MAINT-CHTR-WD changed: james.graves [at] chartercom.com 20131106 #03:08:06Z source: RADB last-modified: 2023-11-13T16:11:26Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 146.214.128.0/17 descr: Proxy Entry for Mallinckrodt LLC AS62882 origin: AS62882 mnt-by: MAINT-CHTR-WD changed: james.graves [at] chartercom.com 20131106 #03:08:27Z source: RADB last-modified: 2023-11-13T16:11:26Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source