These entries are queried from radb.net using whois, you can try my project getting these.
:AS271471 route: 181.233.28.0/22 origin: AS271471 descr: Bit Center admin-c: SLB37-NICBR tech-c: SLB37-NICBR remarks: Proxy Customer Object notify: cgr [at] konnet.com.br mnt-by: MAINT-AS262669 changed: matheus [at] konnet.com.br 20220112 #17:46:01Z source: RADB last-modified: 2023-11-13T16:17:31Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 181.233.28.0/23 origin: AS271471 descr: Bit Center admin-c: SLB37-NICBR tech-c: SLB37-NICBR remarks: Proxy Customer Object notify: cgr [at] konnet.com.br mnt-by: MAINT-AS262669 changed: matheus [at] konnet.com.br 20220112 #16:45:51Z source: RADB last-modified: 2023-11-13T16:17:31Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 181.233.28.0/24 origin: AS271471 descr: Bit Center admin-c: SLB37-NICBR tech-c: SLB37-NICBR remarks: Proxy Customer Object notify: cgr [at] konnet.com.br mnt-by: MAINT-AS262669 changed: matheus [at] konnet.com.br 20230124 #19:30:22Z source: RADB last-modified: 2023-11-13T16:17:30Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 181.233.29.0/24 origin: AS271471 descr: Bit Center admin-c: SLB37-NICBR tech-c: SLB37-NICBR remarks: Proxy Customer Object notify: cgr [at] konnet.com.br mnt-by: MAINT-AS262669 changed: matheus [at] konnet.com.br 20230124 #19:31:18Z source: RADB last-modified: 2023-11-13T16:17:30Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 181.233.30.0/23 origin: AS271471 descr: Bit Center admin-c: SLB37-NICBR tech-c: SLB37-NICBR remarks: Proxy Customer Object notify: cgr [at] konnet.com.br mnt-by: MAINT-AS262669 changed: matheus [at] konnet.com.br 20220112 #16:47:18Z source: RADB last-modified: 2023-11-13T16:17:31Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 181.233.30.0/24 origin: AS271471 descr: Bit Center admin-c: SLB37-NICBR tech-c: SLB37-NICBR remarks: Proxy Customer Object notify: cgr [at] konnet.com.br mnt-by: MAINT-AS262669 changed: matheus [at] konnet.com.br 20230124 #19:31:47Z source: RADB last-modified: 2023-11-13T16:17:30Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 181.233.31.0/24 origin: AS271471 descr: Bit Center admin-c: SLB37-NICBR tech-c: SLB37-NICBR remarks: Proxy Customer Object notify: cgr [at] konnet.com.br mnt-by: MAINT-AS262669 changed: matheus [at] konnet.com.br 20230124 #19:32:32Z source: RADB last-modified: 2023-11-13T16:17:30Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2804:7c08::/32 origin: AS271471 descr: BitCenter Network admin-c: SLB37-NICBR tech-c: SLB37-NICBR remarks: Proxy Customer Object notify: cgr [at] konnet.com.br mnt-by: MAINT-AS262669 changed: matheus [at] konnet.com.br 20220407 source: RADB last-modified: 2023-11-13T16:17:30Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source