These entries are queried from radb.net using whois, you can try my project getting these.
:AS133456 route: 103.230.50.0/23 descr: Route object of 103.230.50.0/23 origin: AS133456 country: SG mnt-lower: MAINT-ALAGASNETWORK-SG mnt-routes: MAINT-ALAGASNETWORK-SG mnt-by: MAINT-ALAGASNETWORK-SG last-modified: 2014-06-18T15:41:27Z source: APNIC rpki-ov-state: valid route: 103.230.50.0/23 descr: route-object for AS23947 origin: AS133456 remarks: Transit via AS10217 Customers notify: support [at] ntt.net.id mnt-by: MAINT-AS10217 changed: fajri.setiawan [at] ntt.co.id 20140428 source: NTTCOM rpki-ov-state: valid route: 103.230.50.0/24 descr: Route object of 103.230.50.0/24 origin: AS133456 country: SG mnt-lower: MAINT-ALAGASNETWORK-SG mnt-routes: MAINT-ALAGASNETWORK-SG mnt-by: MAINT-ALAGASNETWORK-SG last-modified: 2014-06-18T15:41:50Z source: APNIC rpki-ov-state: valid route: 103.230.50.0/24 descr: route-object for AS23947 origin: AS133456 remarks: Transit via AS10217 Customers notify: support [at] ntt.net.id mnt-by: MAINT-AS10217 changed: fajri.setiawan [at] ntt.co.id 20140428 source: NTTCOM rpki-ov-state: valid route: 103.230.51.0/24 descr: Route object of 103.230.51.0/24 origin: AS133456 country: SG mnt-lower: MAINT-ALAGASNETWORK-SG mnt-routes: MAINT-ALAGASNETWORK-SG mnt-by: MAINT-ALAGASNETWORK-SG last-modified: 2014-06-18T15:42:03Z source: APNIC rpki-ov-state: valid route: 103.230.51.0/24 descr: route-object for AS23947 origin: AS133456 remarks: Transit via AS2914 Customers notify: support [at] ntt.net.id mnt-by: MAINT-AS10217 changed: mulyono.hidajad [at] ntt.co.id 20140809 source: NTTCOM rpki-ov-state: valid route6: 2400:ec80::/32 origin: AS133456 descr: ALAGAS NETWORK PTE. LTD. 41 Kallang Pudding Road #03-11 Golden Wheel Building mnt-by: MAINT-ALAGASNETWORK-SG last-modified: 2018-09-05T07:43:14Z source: APNIC rpki-ov-state: valid route6: 2400:ec80:65::/48 origin: AS133456 descr: ALAGAS NETWORK PTE. LTD. 47 Kallang Pudding Road #06-02 Crescent @ Kallang mnt-by: MAINT-ALAGASNETWORK-SG last-modified: 2023-12-22T07:28:03Z country: SG source: APNIC rpki-ov-state: valid route6: 2a10:2f01:213::/48 descr: Customer Route for ready 2 use BGP Server origin: AS133456 remarks: https://www.4b42.com mnt-by: SBMT created: 2023-09-05T09:33:39Z last-modified: 2023-09-05T09:33:39Z source: RIPE remarks: **************************** remarks: * THIS OBJECT IS MODIFIED remarks: * Please note that all data that is generally regarded as personal remarks: * data has been removed from this object. remarks: * To view the original object, please query the RIPE Database at: remarks: * http://www.ripe.net/whois remarks: **************************** rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source