These entries are queried from radb.net using whois, you can try my project getting these.
:AS394448 route: 208.93.100.0/24 descr: DxFeed Infrastructure block CHI descr: https://dxfeed.com origin: AS394448 mnt-by: MNT-DEVEX notify: dxfeed-support [at] devexperts.com changed: azolotarenko [at] devexperts.com 20170607 source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.93.101.0/24 descr: DxFeed Infrastructure block NYC descr: https://dxfeed.com origin: AS394448 mnt-by: MNT-DEVEX notify: dxfeed-support [at] devexperts.com changed: azolotarenko [at] devexperts.com 20170607 source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.93.102.0/24 descr: DxFeed Infrastructure block 3 descr: https://dxfeed.com origin: AS394448 mnt-by: MNT-DEVEX notify: dxfeed-support [at] devexperts.com changed: azolotarenko [at] devexperts.com 20170607 source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source