These entries are queried from radb.net using whois, you can try my project getting these.
:AS5760 route: 23.249.80.0/20 descr: AXIOM SUBNETS ONLY origin: AS5760 mnt-by: MAINT-AS5760 changed: willd [at] staff.gwi.net 20181027 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 64.28.176.0/20 descr: ENABLES SUBNETS ONLY origin: AS5760 mnt-by: MAINT-AS5760 changed: willd [at] staff.gwi.net 20180824 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 66.55.192.0/19 descr: GWI-BLK-4 origin: AS5760 mnt-by: MAINT-AS5760 changed: nse [at] staff.gwi.net 20170501 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 66.55.192.0/19 descr: GWI BLK-1 origin: AS5760 mnt-by: MAINT-AS5760 changed: willd [at] staff.gwi.net 20200701 source: ALTDB rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 66.55.192.0/20 descr: part of /19 origin: AS5760 mnt-by: MAINT-AS5760 changed: nse [at] staff.gwi.net 20170501 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 66.55.208.0/20 descr: part of /19 origin: AS5760 mnt-by: MAINT-AS5760 changed: nse [at] staff.gwi.net 20170501 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 66.63.64.0/18 descr: GWI-BLK-3 origin: AS5760 mnt-by: MAINT-AS5760 changed: nse [at] staff.gwi.net 20170501 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 66.63.64.0/18 descr: GWI BLK-2 origin: AS5760 mnt-by: MAINT-AS5760 changed: willd [at] staff.gwi.net 20200701 source: ALTDB rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 66.63.64.0/20 descr: part of /18 origin: AS5760 mnt-by: MAINT-AS5760 changed: nse [at] staff.gwi.net 20170501 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 66.63.80.0/20 descr: part of /18 origin: AS5760 mnt-by: MAINT-AS5760 changed: nse [at] staff.gwi.net 20170501 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 66.63.96.0/20 descr: part of /18 origin: AS5760 mnt-by: MAINT-AS5760 changed: nse [at] staff.gwi.net 20170501 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 66.63.112.0/20 descr: part of /18 origin: AS5760 mnt-by: MAINT-AS5760 changed: nse [at] staff.gwi.net 20170501 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 66.63.115.0/24 descr: BOWDOIN COLLEGE BLK-2 origin: AS5760 notify: nse [at] staff.gwi.net mnt-by: MAINT-AS5760 changed: nse [at] staff.gwi.net 20161026 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 198.200.10.0/23 descr: MMC-SMHC BLK-1 origin: AS5760 mnt-by: MAINT-AS5760 changed: nse [at] staff.gwi.net 20170221 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 205.209.64.0/19 descr: GWI-BLK-5 origin: AS5760 mnt-by: MAINT-AS5760 changed: nse [at] staff.gwi.net 20170501 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 205.209.64.0/19 descr: GWI BLK-4 origin: AS5760 mnt-by: MAINT-AS5760 changed: willd [at] staff.gwi.net 20200701 source: ALTDB rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 205.209.64.0/20 descr: part of /19 origin: AS5760 mnt-by: MAINT-AS5760 changed: nse [at] staff.gwi.net 20170501 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 205.209.80.0/20 descr: part of /19 origin: AS5760 mnt-by: MAINT-AS5760 changed: nse [at] staff.gwi.net 20170501 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 207.5.128.0/17 descr: GWI BLK-3 origin: AS5760 mnt-by: MAINT-AS5760 changed: willd [at] staff.gwi.net 20200701 source: ALTDB rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 207.5.128.0/20 descr: Part of the /17 supernet origin: AS5760 mnt-by: MAINT-AS5760 changed: nse [at] staff.gwi.net 20170501 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 207.5.144.0/20 descr: more specific route origin: AS5760 mnt-by: MAINT-AS5760 changed: nse [at] staff.gwi.net 20170501 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 207.5.160.0/20 descr: part of /17 supernet origin: AS5760 mnt-by: MAINT-AS5760 changed: nse [at] staff.gwi.net 20170501 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 207.5.176.0/20 descr: part of /17 supernet origin: AS5760 mnt-by: MAINT-AS5760 changed: nse [at] staff.gwi.net 20170501 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 207.5.192.0/20 descr: part of /17 origin: AS5760 mnt-by: MAINT-AS5760 changed: nse [at] staff.gwi.net 20170501 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 207.5.208.0/20 descr: more specific origin: AS5760 mnt-by: MAINT-AS5760 changed: nse [at] staff.gwi.net 20170501 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 216.195.128.0/18 descr: GWI BLK-5 origin: AS5760 mnt-by: MAINT-AS5760 changed: willd [at] staff.gwi.net 20200701 source: ALTDB rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 216.195.128.0/18 descr: GWI-BLK-2 origin: AS5760 mnt-by: MAINT-AS5760 changed: nse [at] staff.gwi.net 20170501 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 216.195.128.0/20 descr: more specific origin: AS5760 mnt-by: MAINT-AS5760 changed: nse [at] staff.gwi.net 20170501 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 216.195.144.0/20 descr: More specific origin: AS5760 mnt-by: MAINT-AS5760 changed: nse [at] staff.gwi.net 20170501 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 216.195.160.0/20 descr: More specific origin: AS5760 mnt-by: MAINT-AS5760 changed: nse [at] staff.gwi.net 20170501 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 216.195.176.0/20 descr: More specific origin: AS5760 mnt-by: MAINT-AS5760 changed: nse [at] staff.gwi.net 20170501 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 216.195.188.0/22 descr: BOWDOIN COLLEGE BLK-3 origin: AS5760 notify: nse [at] staff.gwi.net mnt-by: MAINT-AS5760 changed: nse [at] staff.gwi.net 20161026 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2604:5300::/32 descr: GWI-CORNERSTONE-IPV6-BLK1 origin: AS5760 admin-c: Chris Whelan tech-c: Chris Whelan notify: gwi-network [at] gwi.net mnt-by: MAINT-AS5760 changed: nse [at] staff.gwi.net 20170530 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2606:cc00::/32 descr: GWI BLK-6 origin: AS5760 mnt-by: MAINT-AS5760 changed: willd [at] staff.gwi.net 20200701 source: ALTDB rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2606:cc00::/32 descr: GWI-IPV6-BLK-1 origin: AS5760 admin-c: Chris Whelan tech-c: Chris Whelan notify: gwi-network [at] gwi.net mnt-by: MAINT-AS5760 changed: nse [at] staff.gwi.net 20170501 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source