These entries are queried from radb.net using whois, you can try my project getting these.
:AS394954 route: 52.129.23.0/24 descr: Proxy Registration for Nexacomm by Telx origin: AS394954 mnt-by: MAINT-TELX changed: ipadmin [at] telx.com 20160715 source: ALTDB rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 52.129.23.0/24 descr: NEXACOMM-TX origin: AS394954 remarks: this is non-portable space, no exceptions mnt-by: MAINT-NEXACOMM-BR changed: breeves [at] nexacomm.com 20170816 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source