These entries are queried from radb.net using whois, you can try my project getting these.
:AS135152 route: 103.30.16.0/24 origin: AS135152 descr: LAYERSTACK admin-c: Dennis Ng tech-c: Dennis Ng notify: dennis [at] layerstack.com mnt-by: MAINT-AS133380 changed: dennis [at] layerstack.com 20190130 #15:21:34Z source: RADB last-modified: 2023-11-13T15:55:27Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 103.30.17.0/24 origin: AS135152 descr: LAYERSTACK admin-c: Dennis Ng tech-c: Dennis Ng notify: dennis [at] layerstack.com mnt-by: MAINT-AS133380 changed: dennis [at] layerstack.com 20190130 #15:21:59Z source: RADB last-modified: 2023-11-13T15:55:27Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 103.30.18.0/24 origin: AS135152 descr: LAYERSTACK admin-c: Dennis Ng tech-c: Dennis Ng notify: dennis [at] layerstack.com mnt-by: MAINT-AS133380 changed: dennis [at] layerstack.com 20190130 #15:22:26Z source: RADB last-modified: 2023-11-13T15:55:27Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 103.30.19.0/24 origin: AS135152 descr: LAYERSTACK admin-c: Dennis Ng tech-c: Dennis Ng notify: dennis [at] layerstack.com mnt-by: MAINT-AS133380 changed: dennis [at] layerstack.com 20190130 #15:22:54Z source: RADB last-modified: 2023-11-13T15:55:27Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 103.251.115.0/24 descr: Layerstack Ltd origin: AS135152 mnt-by: MAINT-AS133380 changed: dennis [at] layerstack.com 20220715 source: RADB last-modified: 2023-11-13T16:11:47Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source