These entries are queried from radb.net using whois, you can try my project getting these.
:AS5664 route: 142.55.0.0/16 descr: SHERIDANC origin: AS5664 mnt-by: MAINT-AS549 changed: config [at] onet.on.ca 20011026 source: BELL rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 142.55.0.0/16 descr: Sheridan college prefix origin: AS5664 notify: shahid.ajaz [at] orano.on.ca mnt-by: ORANO-MNT changed: unread [at] ripe.net 20000101 source: CANARIE rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 142.55.0.0/16 origin: AS5664 descr: Sheridan College 1430 Trafalgar Rd. Oakville ON L6H 2L1 Canada admin-c: ZS151-ARIN tech-c: ZS151-ARIN mnt-by: MNT-SHERID-8-Z created: 2022-03-02T13:51:45Z last-modified: 2022-03-02T13:51:45Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 142.55.0.0/20 descr: SHERIDANC origin: AS5664 mnt-by: MAINT-AS549 changed: config [at] onet.on.ca 20011026 source: BELL rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 142.55.0.0/20 descr: Sheridan college prefix origin: AS5664 notify: shahid.ajaz [at] orano.on.ca mnt-by: ORANO-MNT changed: unread [at] ripe.net 20000101 source: CANARIE rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 142.55.243.0/24 descr: SHERIDANC origin: AS5664 mnt-by: MAINT-AS549 changed: config [at] onet.on.ca 20011026 source: BELL rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source