These entries are queried from radb.net using whois, you can try my project getting these.
:AS31503 route: 91.244.160.0/21 origin: AS31503 mnt-by: NEWLINETEL-MNT created: 2018-03-16T13:20:37Z last-modified: 2018-03-16T13:20:37Z source: RIPE 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