These entries are queried from radb.net using whois, you can try my project getting these.
:AS57708 route: 171.25.242.0/23 descr: CHMZ address block 171.25.242.0/23 origin: AS57708 mnt-by: MNT-Chepetsky-Mechanical-Plant created: 2012-02-07T15:09:08Z last-modified: 2012-02-07T15:09:08Z 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 route: 171.25.242.0/24 descr: CHMZ address block 171.25.242.0/24 origin: AS57708 mnt-by: MNT-Chepetsky-Mechanical-Plant created: 2012-02-07T15:07:10Z last-modified: 2012-02-07T15:07:10Z 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 route: 171.25.243.0/24 descr: CHMZ address block 171.25.243.0/24 origin: AS57708 mnt-by: MNT-Chepetsky-Mechanical-Plant created: 2012-02-07T15:08:21Z last-modified: 2012-02-07T15:08:21Z 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