These entries are queried from radb.net using whois, you can try my project getting these.
:AS132098 route: 103.28.0.0/22 descr: NineNETWORKS-KH origin: AS132098 mnt-by: MAINT-AS18403 changed: netadmin [at] fpt.vn 20120112 #06:53:15Z source: RADB last-modified: 2023-11-13T15:41:56Z rpki-ov-state: valid route: 103.28.0.0/22 origin: AS132098 descr: Craig Wireless Systems Asia, Inc. VENUS BROADBAND (CAMBODIA) #6, St. 3 (Plov lom), Sangkat Stung Meanchey, Khan Meanchey mnt-by: MAINT-9NETWORKS-KH last-modified: 2022-11-30T09:02:35Z source: APNIC rpki-ov-state: valid route: 103.28.0.0/24 descr: Proxy-registered route object origin: AS132098 notify: matthew.chan [at] hgc.com.hk mnt-by: MAINT-HGC-INTL changed: matthew.chan [at] hgc.com.hk 20170112 source: RADB last-modified: 2023-11-13T15:50:34Z rpki-ov-state: valid route: 103.28.0.0/24 descr: Proxy route register origin: AS132098 mnt-by: MAINT-VNPT-GLOBAL notify: noc [at] vnptglobal.com.vn changed: noc [at] vnptglobal.com.vn 20130422 source: NTTCOM rpki-ov-state: valid route: 103.28.0.0/24 origin: AS132098 descr: Craig Wireless Systems Asia, Inc. VENUS BROADBAND (CAMBODIA) #6, St. 3 (Plov lom), Sangkat Stung Meanchey, Khan Meanchey mnt-by: MAINT-9NETWORKS-KH last-modified: 2022-11-30T09:02:37Z source: APNIC rpki-ov-state: valid route: 103.28.1.0/24 descr: Proxy route register origin: AS132098 mnt-by: MAINT-VNPT-GLOBAL notify: noc [at] vnptglobal.com.vn changed: noc [at] vnptglobal.com.vn 20130422 source: NTTCOM rpki-ov-state: valid route: 103.28.1.0/24 descr: Proxy-registered route object origin: AS132098 notify: matthew.chan [at] hgc.com.hk mnt-by: MAINT-HGC-INTL changed: matthew.chan [at] hgc.com.hk 20170112 source: RADB last-modified: 2023-11-13T15:50:34Z rpki-ov-state: valid route: 103.28.1.0/24 origin: AS132098 descr: Craig Wireless Systems Asia, Inc. VENUS BROADBAND (CAMBODIA) #6, St. 3 (Plov lom), Sangkat Stung Meanchey, Khan Meanchey mnt-by: MAINT-9NETWORKS-KH last-modified: 2022-11-30T09:02:40Z source: APNIC rpki-ov-state: valid route: 103.28.2.0/24 descr: Proxy route register origin: AS132098 mnt-by: MAINT-VNPT-GLOBAL notify: noc [at] vnptglobal.com.vn changed: noc [at] vnptglobal.com.vn 20130422 source: NTTCOM rpki-ov-state: valid route: 103.28.2.0/24 descr: Proxy-registered route object origin: AS132098 notify: matthew.chan [at] hgc.com.hk mnt-by: MAINT-HGC-INTL changed: matthew.chan [at] hgc.com.hk 20170112 source: RADB last-modified: 2023-11-13T15:50:34Z rpki-ov-state: valid route: 103.28.2.0/24 origin: AS132098 descr: Craig Wireless Systems Asia, Inc. VENUS BROADBAND (CAMBODIA) #6, St. 3 (Plov lom), Sangkat Stung Meanchey, Khan Meanchey mnt-by: MAINT-9NETWORKS-KH last-modified: 2022-11-30T09:02:42Z source: APNIC rpki-ov-state: valid route: 103.28.3.0/24 descr: Proxy-registered route object origin: AS132098 notify: matthew.chan [at] hgc.com.hk mnt-by: MAINT-HGC-INTL changed: matthew.chan [at] hgc.com.hk 20170112 source: RADB last-modified: 2023-11-13T15:50:34Z rpki-ov-state: valid route: 103.28.3.0/24 origin: AS132098 descr: Craig Wireless Systems Asia, Inc. VENUS BROADBAND (CAMBODIA) #6, St. 3 (Plov lom), Sangkat Stung Meanchey, Khan Meanchey mnt-by: MAINT-9NETWORKS-KH last-modified: 2022-11-30T09:02:45Z source: APNIC rpki-ov-state: valid route: 103.28.3.0/24 descr: Proxy route register origin: AS132098 mnt-by: MAINT-VNPT-GLOBAL notify: noc [at] vnptglobal.com.vn changed: noc [at] vnptglobal.com.vn 20130422 source: NTTCOM rpki-ov-state: valid