These entries are queried from radb.net using whois, you can try my project getting these.
:AS328260 route: 102.176.251.0/24 descr: SportpesaSA origin: AS328260 mnt-by: SPORTPESA-MNT changed: *** [at] sportpesa.com 20180911 source: AFRINIC rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 102.176.251.0/24 origin: AS328260 mnt-by: Sportpesa-ZA created: 2017-12-20T14:12:54Z last-modified: 2018-09-04T19:03:58Z source: RIPE-NONAUTH remarks: **************************** remarks: * THIS OBJECT IS MODIFIED remarks: * Please note that all data that is generally regarded as personal remarks: * data has been removed from this object. remarks: * To view the original object, please query the RIPE Database at: remarks: * http://www.ripe.net/whois remarks: **************************** rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source