These entries are queried from radb.net using whois, you can try my project getting these.
:AS264063 route: 143.137.48.0/22 origin: AS264063 remarks: Auto-created by TC IRR from NIC.br and RIPE RIS data notify: infra [at] imatelecom.com.br mnt-by: MAINT-AS264063 source: TC last-modified: 2022-03-05T14:50:32Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 143.137.48.0/22 descr: Proxy-registered route object remarks: --------------------------------- remarks: For SECURITY issues, please send messages to remarks: origin AS administrator remarks: (e.g. whois -h whois.registro.br AS264063) remarks: --------------------------------- remarks: This route is from a Oi customer which remarks: is being exported under origin AS below. remarks: It was created by us because no other remarks: route object with the same origin was found. remarks: --------------------------------- remarks: Please contact BGPOI-RADB if you have any remarks: questions regarding this object. remarks: --------------------------------- origin: AS264063 notify: ip-bgp [at] oi.net.br mnt-by: MAINT-AS8167 changed: ip-bgp [at] oi.net.br 20171205 source: RADB last-modified: 2023-11-13T15:53:43Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 143.137.48.0/23 descr: CLARO S.A. Customer origin: AS264063 remarks: Proxy Object notify: irradmin [at] embratel.net.br mnt-by: MAINT-AS4230 changed: irradmin [at] embratel.net.br 20210312 source: RADB last-modified: 2023-11-13T16:05:10Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 143.137.50.0/23 descr: CLARO S.A. Customer origin: AS264063 remarks: Proxy Object notify: irradmin [at] embratel.net.br mnt-by: MAINT-AS4230 changed: irradmin [at] embratel.net.br 20210312 source: RADB last-modified: 2023-11-13T16:05:10Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2804:2a30::/32 origin: AS264063 remarks: Auto-created by TC IRR from NIC.br and RIPE RIS data notify: infra [at] imatelecom.com.br mnt-by: MAINT-AS264063 source: TC last-modified: 2022-03-05T14:50:32Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2804:2a30::/32 descr: Proxy-registered route object remarks: --------------------------------- remarks: For SECURITY issues, please send messages to remarks: origin AS administrator remarks: (e.g. whois -h whois.registro.br AS264063) remarks: --------------------------------- remarks: This route is from a Oi customer which remarks: is being exported under origin AS below. remarks: It was created by us because no other remarks: route object with the same origin was found. remarks: --------------------------------- remarks: Please contact BGPOI-RADB if you have any remarks: questions regarding this object. remarks: --------------------------------- origin: AS264063 notify: ip-bgp [at] oi.net.br mnt-by: MAINT-AS8167 changed: ip-bgp [at] oi.net.br 20171205 source: RADB last-modified: 2023-11-13T15:53:43Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source