These entries are queried from radb.net using whois, you can try my project getting these.
:AS23251 route: 199.244.12.0/24 origin: AS23251 descr: proxy route object for customer Sungard admin-c: UNITAS-SOC tech-c: UNITAS-SOC notify: netops [at] unitasglobal.com mnt-by: MAINT-AS1828 changed: netops [at] unitasglobal.com 20201120 #20:36:24Z source: RADB last-modified: 2023-11-13T16:03:01Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 207.45.154.0/24 descr: US Signal Downstream Customer origin: AS23251 mnt-by: MAINT-AS26554 changed: noc [at] ussignal.com 20151112 #13:32:02Z source: RADB last-modified: 2023-11-13T15:48:27Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 207.45.158.0/24 descr: route update via web origin: AS23251 mnt-by: LEVEL3-MNT changed: Kanagarajan.Ranganathan [at] level3.com 20081224 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 207.45.158.0/24 descr: route for downstream customer Bridgestone origin: AS23251 mnt-by: MAINT-AS26554 changed: noc [at] ussignalcom.com 20100929 #20:32:28Z source: RADB last-modified: 2023-11-13T15:41:01Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source