These entries are queried from radb.net using whois, you can try my project getting these.
:AS56145 route: 103.2.220.0/22 descr: TTN-VN origin: AS56145 notify: internet_tech [at] hanoitelecom.com mnt-by: MAINT-HANOITELECOM changed: trungnx [at] hanoitelecom.com 20130710 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 103.2.220.0/23 descr: Proxy-registered route object origin: AS56145 notify: matthew.chan [at] hgc.com.hk mnt-by: MAINT-HGC-INTL changed: matthew.chan [at] hgc.com.hk 20130802 source: RADB last-modified: 2023-11-13T15:45:33Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 103.2.220.0/23 descr: TTN-VN origin: AS56145 notify: internet_tech [at] hanoitelecom.com mnt-by: MAINT-HANOITELECOM changed: trungnx [at] hanoitelecom.com 20130710 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 103.2.220.0/24 descr: Proxy-registered route object origin: AS56145 notify: matthew.chan [at] hgc.com.hk mnt-by: MAINT-HGC-INTL changed: matthew.chan [at] hgc.com.hk 20130802 source: RADB last-modified: 2023-11-13T15:45:33Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 103.2.220.0/24 descr: TTN-VN origin: AS56145 notify: internet_tech [at] hanoitelecom.com mnt-by: MAINT-HANOITELECOM changed: trungnx [at] hanoitelecom.com 20130710 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 103.2.221.0/24 descr: Proxy-registered route object origin: AS56145 notify: matthew.chan [at] hgc.com.hk mnt-by: MAINT-HGC-INTL changed: matthew.chan [at] hgc.com.hk 20130802 source: RADB last-modified: 2023-11-13T15:45:33Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 103.2.221.0/24 descr: TTN-VN origin: AS56145 notify: internet_tech [at] hanoitelecom.com mnt-by: MAINT-HANOITELECOM changed: trungnx [at] hanoitelecom.com 20130710 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 103.2.222.0/23 descr: Proxy-registered route object origin: AS56145 notify: matthew.chan [at] hgc.com.hk mnt-by: MAINT-HGC-INTL changed: matthew.chan [at] hgc.com.hk 20130802 source: RADB last-modified: 2023-11-13T15:45:33Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 103.2.222.0/23 descr: TTN-VN origin: AS56145 notify: internet_tech [at] hanoitelecom.com mnt-by: MAINT-HANOITELECOM changed: trungnx [at] hanoitelecom.com 20130710 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 103.2.222.0/24 descr: Proxy-registered route object origin: AS56145 notify: matthew.chan [at] hgc.com.hk mnt-by: MAINT-HGC-INTL changed: matthew.chan [at] hgc.com.hk 20130802 source: RADB last-modified: 2023-11-13T15:45:33Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 103.2.222.0/24 descr: TTN-VN origin: AS56145 notify: internet_tech [at] hanoitelecom.com mnt-by: MAINT-HANOITELECOM changed: trungnx [at] hanoitelecom.com 20130710 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 103.2.223.0/24 descr: TTN-VN origin: AS56145 notify: internet_tech [at] hanoitelecom.com mnt-by: MAINT-HANOITELECOM changed: trungnx [at] hanoitelecom.com 20130710 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 103.2.223.0/24 descr: Proxy-registered route object origin: AS56145 notify: matthew.chan [at] hgc.com.hk mnt-by: MAINT-HGC-INTL changed: matthew.chan [at] hgc.com.hk 20130802 source: RADB last-modified: 2023-11-13T15:45:33Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source