These entries are queried from radb.net using whois, you can try my project getting these.
:AS263997 route: 143.0.52.0/22 descr: BITMAIL SERVICOS DE INFORMATICA LTDA - ME origin: AS263997 notify: db-admin [at] bgp.net.br mnt-by: MAINT-AS263997 changed: db-admin [at] bgp.net.br 20201125 source: TC last-modified: 2021-05-05T02:07:41Z rpki-ov-state: valid route: 143.0.52.0/22 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 AS263997) 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: AS263997 notify: ip-bgp [at] oi.net.br mnt-by: MAINT-AS8167 changed: ip-bgp [at] oi.net.br 20171113 source: RADB last-modified: 2023-11-13T15:53:43Z rpki-ov-state: valid route: 143.0.52.0/23 descr: CLARO S.A. Customer origin: AS263997 remarks: Proxy Object notify: irradmin [at] embratel.net.br mnt-by: MAINT-AS4230 changed: irradmin [at] embratel.net.br 20201210 source: RADB last-modified: 2023-11-13T16:03:08Z rpki-ov-state: valid route: 143.0.52.0/24 descr: CLARO S.A. Customer origin: AS263997 remarks: Proxy Object notify: irradmin [at] embratel.net.br mnt-by: MAINT-AS4230 changed: irradmin [at] embratel.net.br 20200706 source: RADB last-modified: 2023-11-13T16:01:11Z rpki-ov-state: valid route: 143.0.53.0/24 descr: CLARO S.A. Customer origin: AS263997 remarks: Proxy Object notify: irradmin [at] embratel.net.br mnt-by: MAINT-AS4230 changed: irradmin [at] embratel.net.br 20200706 source: RADB last-modified: 2023-11-13T16:01:11Z rpki-ov-state: valid route: 143.0.54.0/23 descr: CLARO S.A. Customer origin: AS263997 remarks: Proxy Object notify: irradmin [at] embratel.net.br mnt-by: MAINT-AS4230 changed: irradmin [at] embratel.net.br 20201210 source: RADB last-modified: 2023-11-13T16:03:08Z rpki-ov-state: valid route: 143.0.54.0/24 descr: CLARO S.A. Customer origin: AS263997 remarks: Proxy Object notify: irradmin [at] embratel.net.br mnt-by: MAINT-AS4230 changed: irradmin [at] embratel.net.br 20201210 source: RADB last-modified: 2023-11-13T16:03:08Z rpki-ov-state: valid route: 143.0.55.0/24 descr: CLARO S.A. Customer origin: AS263997 remarks: Proxy Object notify: irradmin [at] embratel.net.br mnt-by: MAINT-AS4230 changed: irradmin [at] embratel.net.br 20201210 source: RADB last-modified: 2023-11-13T16:03:08Z rpki-ov-state: valid route6: 2804:2918::/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 AS263997) 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: AS263997 notify: ip-bgp [at] oi.net.br mnt-by: MAINT-AS8167 changed: ip-bgp [at] oi.net.br 20171113 source: RADB last-modified: 2023-11-13T15:53:43Z rpki-ov-state: valid route6: 2804:2d20::/32 descr: This is a Commcorp Telecom customer proxy route object that was created because no existing route object with the same origin was found. Please contact noc [at] commcorp.com.br if you have any questions regarding this object. origin: AS263997 mnt-by: MAINT-AS14840 changed: gacosta [at] commcorp.com.br 20200721 source: RADB last-modified: 2023-11-13T16:01:15Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source