These entries are queried from radb.net using whois, you can try my project getting these.
:AS4043 route: 199.5.171.0/24 descr: Montana Internet Corporation 314 North Last Chance Gulch Helena MT 59601, USA origin: AS4043 member-of: RS-COMM_NSFNET notify: forrestc [at] imach.com mnt-by: MAINT-AS4043 changed: forrestc [at] imach.com 20060410 source: ALTDB rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 199.5.172.0/24 descr: Montana Internet Corporation, 314 North Last Chance Gulch, Helena MT 59601, USA origin: AS4043 member-of: RS-COMM_NSFNET notify: forrestc [at] imach.com mnt-by: MAINT-AS4043 changed: forrestc [at] imach.com 20060410 source: ALTDB rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 199.242.242.0/24 descr: The Innovation Machine 100 Stabern Helena MT 59601, USA origin: AS4043 member-of: RS-COMM_NSFNET mnt-by: MAINT-AS4043 changed: forrestc [at] imach.om 20000714 source: ALTDB rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 206.127.64.0/18 descr: Montana Internet Corporation 314 North Last Chance Gulch Helena MT 59601, USA origin: AS4043 member-of: RS-COMM_NSFNET notify: forrestc [at] imach.com mnt-by: MAINT-AS4043 changed: forrestc [at] imach.com 20000524 source: ALTDB rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 209.161.128.0/19 descr: Montana Internet Corporation 314 North Last Chance Helena MT 59601, USA origin: AS4043 member-of: RS-COMM_NSFNET notify: forrestc [at] imach.com mnt-by: MAINT-AS4043 changed: forrestc [at] imach.com 20000524 source: ALTDB rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source