These entries are queried from radb.net using whois, you can try my project getting these.
:AS263341 route: 168.228.160.0/22 descr: proxy for ultranet origin: AS263341 mnt-by: MAINT-AS266409 changed: bgp [at] secw.net.br 20200707 source: ALTDB rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 168.228.160.0/22 origin: AS263341 remarks: Auto-created by TC IRR from NIC.br and RIPE RIS data notify: fabio.guerino [at] ultranetbrasil.com.br mnt-by: MAINT-AS263341 source: TC last-modified: 2021-07-26T20:05:21Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 191.36.180.0/22 origin: AS263341 remarks: Auto-created by TC IRR from NIC.br and RIPE RIS data notify: fabio.guerino [at] ultranetbrasil.com.br mnt-by: MAINT-AS263341 source: TC last-modified: 2021-07-26T20:05:21Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 191.36.180.0/22 descr: proxy for ultranet origin: AS263341 mnt-by: MAINT-AS266409 changed: bgp [at] secw.net.br 20200708 source: ALTDB rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 191.36.180.0/22 origin: AS263341 descr: FABIO DOS SANTOS GUERINO INFORMATICA - ME mnt-by: MAINT-AS52468 changed: jcgarciab [at] ufinet.com 20220907 #19:49:45Z source: RADB last-modified: 2023-11-13T16:12:26Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2804:14a4::/32 descr: CLARO S.A. Customer origin: AS263341 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: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2804:14a4::/32 origin: AS263341 remarks: Auto-created by TC IRR from NIC.br and RIPE RIS data notify: fabio.guerino [at] ultranetbrasil.com.br mnt-by: MAINT-AS263341 source: TC last-modified: 2021-07-26T20:05:21Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source