These entries are queried from radb.net using whois, you can try my project getting these.
:AS58509 route: 203.12.48.0/23 descr: Over the Wire origin: AS58509 notify: noc [at] overthewire.com.au mnt-by: MAINT-OTWN1 changed: noc [at] overthewire.com.au 20181005 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.12.48.0/24 descr: Proxy route object registered by AS2764 origin: AS58509 remarks: This route object was created by AAPT on behalf of a customer. remarks: As some of AAPTs upstream networks filter based on IRR objects, remarks: this route object has been created to ensure that the advertisement remarks: of this prefix is not rejected. notify: routing.shared [at] aapt.com.au mnt-by: MAINT-AS2764 changed: nobody [at] aapt.com.au 20201015 source: RADB last-modified: 2023-11-13T16:16:45Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.12.48.0/24 descr: Over the Wire origin: AS58509 notify: noc [at] overthewire.com.au mnt-by: MAINT-OTWN1 changed: noc [at] overthewire.com.au 20181005 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.12.49.0/24 descr: Proxy route object registered by AS2764 origin: AS58509 remarks: This route object was created by AAPT on behalf of a customer. remarks: As some of AAPTs upstream networks filter based on IRR objects, remarks: this route object has been created to ensure that the advertisement remarks: of this prefix is not rejected. notify: routing.shared [at] aapt.com.au mnt-by: MAINT-AS2764 changed: nobody [at] aapt.com.au 20201015 source: RADB last-modified: 2023-11-13T16:16:45Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.12.49.0/24 descr: Over the Wire origin: AS58509 notify: noc [at] overthewire.com.au mnt-by: MAINT-OTWN1 changed: noc [at] overthewire.com.au 20181005 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.12.50.0/23 descr: Over the Wire origin: AS58509 notify: noc [at] overthewire.com.au mnt-by: MAINT-OTWN1 changed: noc [at] overthewire.com.au 20181005 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.12.50.0/24 descr: Over the Wire origin: AS58509 notify: noc [at] overthewire.com.au mnt-by: MAINT-OTWN1 changed: noc [at] overthewire.com.au 20181005 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.12.50.0/24 descr: Proxy route object registered by AS2764 origin: AS58509 remarks: This route object was created by AAPT on behalf of a customer. remarks: As some of AAPTs upstream networks filter based on IRR objects, remarks: this route object has been created to ensure that the advertisement remarks: of this prefix is not rejected. notify: routing.shared [at] aapt.com.au mnt-by: MAINT-AS2764 changed: nobody [at] aapt.com.au 20201015 source: RADB last-modified: 2023-11-13T16:16:45Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.12.51.0/24 descr: Proxy route object registered by AS2764 origin: AS58509 remarks: This route object was created by AAPT on behalf of a customer. remarks: As some of AAPTs upstream networks filter based on IRR objects, remarks: this route object has been created to ensure that the advertisement remarks: of this prefix is not rejected. notify: routing.shared [at] aapt.com.au mnt-by: MAINT-AS2764 changed: nobody [at] aapt.com.au 20201015 source: RADB last-modified: 2023-11-13T16:16:45Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.12.51.0/24 descr: Over the Wire origin: AS58509 notify: noc [at] overthewire.com.au mnt-by: MAINT-OTWN1 changed: noc [at] overthewire.com.au 20181005 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source