These entries are queried from radb.net using whois, you can try my project getting these.
:AS133581 route: 103.43.229.0/24 descr: TRIPLETNET route object for Thailandpost origin: AS133581 mnt-by: MAINT-AS45758 changed: hatmans [at] gmail.com 20150201 #17:35:34Z source: RADB last-modified: 2023-11-13T15:47:06Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 147.50.88.0/24 origin: AS133581 descr: AWN route object for AWN-ISP-Corp remarks: Please contact awn-noc [at] ais.co.th if you have any questions regarding this object mnt-by: MAINT-AS45430 changed: khajornp [at] ais.co.th 20230802 #10:40:51Z source: RADB last-modified: 2023-11-13T16:17:51Z rpki-ov-state: valid route: 147.50.88.0/24 origin: AS133581 descr: ADVANCED WIRELESS NETWORK COMPANY LIMITED 414 Phaholyothin Rd Samsen Nai Phayathai mnt-by: MAINT-AWN-CO-LTD-TH last-modified: 2023-08-02T10:48:39Z source: APNIC rpki-ov-state: valid