These entries are queried from radb.net using whois, you can try my project getting these.
:AS11574 route: 63.64.148.0/22 descr: Avalon Systems, Inc. origin: AS11574 notify: frappuhn [at] usol.com mnt-by: MAINT-AVALONSYS changed: frappuhn [at] usol.com 20010122 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 63.93.132.0/22 descr: Avalon Systems, Inc. origin: AS11574 notify: frappuhn [at] usol.com mnt-by: MAINT-AVALONSYS changed: frappuhn [at] usol.com 20010122 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.232.58.0/23 descr: Avalon Systems, Inc. origin: AS11574 notify: frappuhn [at] usol.com mnt-by: MAINT-AVALONSYS changed: frappuhn [at] usol.com 20010122 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.240.251.0/24 descr: Avalon Systems, Inc. origin: AS11574 notify: frappuhn [at] usol.com mnt-by: MAINT-AVALONSYS changed: frappuhn [at] usol.com 20010122 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source