These entries are queried from radb.net using whois, you can try my project getting these.
:AS268300 route: 45.237.56.0/22 origin: AS268300 remarks: Auto-created by TC IRR from NIC.br and RIPE RIS data notify: noc [at] ativartelecom.com.br mnt-by: MAINT-AS268300 source: TC last-modified: 2021-11-12T14:20:29Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 45.237.56.0/22 descr: ITX-DIFERRARI origin: AS268300 mnt-by: MAINT-AS18678 changed: noc [at] internexa.com 20180618 #17:40:22Z source: RADB last-modified: 2023-11-13T15:53:49Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 45.237.56.0/23 descr: CLARO S.A. Customer origin: AS268300 remarks: Proxy Object notify: irradmin [at] embratel.net.br mnt-by: MAINT-AS4230 changed: irradmin [at] embratel.net.br 20190524 source: RADB last-modified: 2023-11-13T15:56:25Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 45.237.56.0/24 descr: CLARO S.A. Customer origin: AS268300 remarks: Proxy Object notify: irradmin [at] embratel.net.br mnt-by: MAINT-AS4230 changed: irradmin [at] embratel.net.br 20190524 source: RADB last-modified: 2023-11-13T15:56:25Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 45.237.57.0/24 descr: CLARO S.A. Customer origin: AS268300 remarks: Proxy Object notify: irradmin [at] embratel.net.br mnt-by: MAINT-AS4230 changed: irradmin [at] embratel.net.br 20190524 source: RADB last-modified: 2023-11-13T15:56:25Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 45.237.58.0/23 descr: CLARO S.A. Customer origin: AS268300 remarks: Proxy Object notify: irradmin [at] embratel.net.br mnt-by: MAINT-AS4230 changed: irradmin [at] embratel.net.br 20190524 source: RADB last-modified: 2023-11-13T15:56:25Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 45.237.58.0/24 descr: CLARO S.A. Customer origin: AS268300 remarks: Proxy Object notify: irradmin [at] embratel.net.br mnt-by: MAINT-AS4230 changed: irradmin [at] embratel.net.br 20190524 source: RADB last-modified: 2023-11-13T15:56:25Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 45.237.59.0/24 descr: CLARO S.A. Customer origin: AS268300 remarks: Proxy Object notify: irradmin [at] embratel.net.br mnt-by: MAINT-AS4230 changed: irradmin [at] embratel.net.br 20190524 source: RADB last-modified: 2023-11-13T15:56:25Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2804:4f0c::/32 origin: AS268300 remarks: Auto-created by TC IRR from NIC.br and RIPE RIS data notify: noc [at] ativartelecom.com.br mnt-by: MAINT-AS268300 source: TC last-modified: 2021-11-12T14:20:29Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2804:4f0c::/32 descr: CLARO S.A. Customer origin: AS268300 remarks: Proxy Object notify: irradmin [at] embratel.net.br mnt-by: MAINT-AS4230 changed: irradmin [at] embratel.net.br 20190619 source: RADB last-modified: 2023-11-13T15:56:39Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source