These entries are queried from radb.net using whois, you can try my project getting these.
:AS21326 route: 15.32.64.0/18 descr: To allow routing to other ISPs origin: AS21326 mnt-by: MAINT-AS7132 changed: daniel.rueegg [at] intl.att.com 20191204 source: RADB last-modified: 2023-11-13T15:59:15Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 15.32.76.0/23 descr: To allow routing to other ISPs origin: AS21326 mnt-by: MAINT-AS7132 changed: daniel.rueegg [at] intl.att.com 20230425 source: RADB last-modified: 2023-11-13T16:17:05Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 15.36.64.0/18 descr: To allow routing to other ISPs origin: AS21326 mnt-by: MAINT-AS7132 changed: daniel.rueegg [at] intl.att.com 20210601 source: RADB last-modified: 2023-11-13T16:05:47Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 15.36.69.0/24 descr: To allow routing to other ISPs origin: AS21326 mnt-by: MAINT-AS7132 changed: Daniel.rueegg [at] intl.att.com 20220927 source: RADB last-modified: 2023-11-13T16:12:32Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 15.36.70.0/23 descr: To allow routing to other ISPs origin: AS21326 mnt-by: MAINT-AS7132 changed: Daniel.rueegg [at] intl.att.com 20220927 source: RADB last-modified: 2023-11-13T16:12:32Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 15.36.120.0/22 descr: To allow routing to other ISPs origin: AS21326 mnt-by: MAINT-AS7132 changed: Daniel.rueegg [at] intl.att.com 20220927 source: RADB last-modified: 2023-11-13T16:12:32Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 15.36.124.0/23 descr: To allow routing to other ISPs origin: AS21326 mnt-by: MAINT-AS7132 changed: Daniel.rueegg [at] intl.att.com 20220927 source: RADB last-modified: 2023-11-13T16:12:32Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 15.40.64.0/18 descr: To allow routing to other ISPs origin: AS21326 mnt-by: MAINT-AS7132 changed: daniel.rueegg [at] intl.att.com 20191204 source: RADB last-modified: 2023-11-13T15:59:15Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 15.44.64.0/18 descr: To allow routing to other ISPs origin: AS21326 mnt-by: MAINT-AS7132 changed: daniel.rueegg [at] intl.att.com 20230718 source: RADB last-modified: 2023-11-13T16:17:48Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source