These entries are queried from radb.net using whois, you can try my project getting these.
:AS268148 route6: 2804:58c4::/32 origin: AS268148 descr: Angola Cables proxy-registered route object for customer AS268148 remarks: ***************************************************************************** remarks: This object is for *268148* customer routes remarks: which is being exported from this source AS remarks: This route object was create because no existing remarks: route object with the same sources was found , and remarks: since some Angola Cables peers filter based on remarks: this object is not created remarks: Please contact peering [at] angolacables.co.ao if you remarks: have any questions regarding this object remarks: *************************************************************** mnt-by: MAINT-AS37468 changed: noc [at] angolacables.co.ao 20190123 #11:13:59Z source: RADB last-modified: 2023-11-13T15:55:25Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source