These entries are queried from radb.net using whois, you can try my project getting these.
:AS28347 route: 177.8.144.0/21 descr: Unotel Proxy Object origin: AS28347 remarks: mnt-by: MAINT-NTTCOM-RA changed: brian [at] ntt.net 20121001 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 177.8.144.0/22 descr: Unotel Proxy Object origin: AS28347 remarks: mnt-by: MAINT-NTTCOM-RA changed: brian [at] ntt.net 20121001 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 179.106.80.0/21 descr: Proxy Object for AS28347 origin: AS28347 remarks: contact ce-ipadmin [at] us.ntt.net to request removal mnt-by: MAINT-NTTCOM-RA changed: bfoust [at] us.ntt.net 20130601 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 186.235.192.0/19 descr: Unotel Proxy Object origin: AS28347 remarks: mnt-by: MAINT-NTTCOM-RA changed: brian [at] ntt.net 20121001 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 186.237.208.0/21 descr: Unotel Proxy Object origin: AS28347 remarks: mnt-by: MAINT-NTTCOM-RA changed: brian [at] ntt.net 20121001 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 186.249.8.0/21 descr: Unotel Proxy Object origin: AS28347 remarks: mnt-by: MAINT-NTTCOM-RA changed: brian [at] ntt.net 20121001 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 186.250.116.0/22 descr: Proxy Object for AS28347 origin: AS28347 remarks: contact ce-ipadmin [at] us.ntt.net to request removal mnt-by: MAINT-NTTCOM-RA changed: bfoust [at] us.ntt.net 20130524 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 187.87.144.0/20 descr: Proxy Object for AS28347 origin: AS28347 remarks: contact ce-ipadmin [at] us.ntt.net to request removal mnt-by: MAINT-NTTCOM-RA changed: bfoust [at] us.ntt.net 20130524 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2001:12b8::/32 descr: PROXY FOR OPENX CUSTOMER origin: AS28347 mnt-by: MAINT-AS263444 notify: registro [at] openx.com.br changed: registro [at] openx.com.br 20200416 remarks: Thu Apr 16 15:49:22 2020 source: RADB last-modified: 2023-11-13T16:00:23Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source