These entries are queried from radb.net using whois, you can try my project getting these.
:AS139620 route: 103.142.144.0/23 descr: CAT route object for Myanmar Telecommunication Network Public Co.,Ltd. origin: AS139620 mnt-by: MAINT-THIX-CAT-TH changed: catdb [at] cat.net.th 20190904 source: RADB last-modified: 2023-11-13T15:57:23Z rpki-ov-state: valid route: 103.142.144.0/23 origin: AS139620 descr: MYANMAR TELECOMMUNICATION NETWORK PUBLIC COMPANY LIMITED MTN Teleport, Corner of Htee-hlaing 1st Street and Kyansitth No.288/290,MWEA Tower,R702,Shwedagon Pagoda,Dagon Tsp,YGN,MM mnt-by: MAINT-MTNPCL-MM last-modified: 2024-01-07T03:57:00Z mnt-lower: MAINT-MTNPCL-MM mnt-routes: MAINT-MTNPCL-MM mnt-routes: MAINT-MTNPCL-MM source: APNIC rpki-ov-state: valid route: 103.142.144.0/24 origin: AS139620 descr: MYANMAR TELECOMMUNICATION NETWORK PUBLIC COMPANY LIMITED MTN Teleport, Corner of Htee-hlaing 1st Street and Kyansitth No.288/290,MWEA Tower,R702,Shwedagon Pagoda,Dagon Tsp,YGN,MM mnt-by: MAINT-MTNPCL-MM last-modified: 2024-01-07T03:57:49Z mnt-lower: MAINT-MTNPCL-MM mnt-routes: MAINT-MTNPCL-MM source: APNIC rpki-ov-state: valid route: 103.142.144.0/24 descr: CAT route object for Myanmar Telecommunication Network Public Co.,Ltd. origin: AS139620 mnt-by: MAINT-THIX-CAT-TH changed: catdb [at] cat.net.th 20190904 source: RADB last-modified: 2023-11-13T15:57:23Z rpki-ov-state: valid route: 103.142.145.0/24 descr: CAT route object for Myanmar Telecommunication Network Public Co.,Ltd. origin: AS139620 mnt-by: MAINT-THIX-CAT-TH changed: catdb [at] cat.net.th 20190904 source: RADB last-modified: 2023-11-13T15:57:23Z rpki-ov-state: valid route: 103.142.145.0/24 origin: AS139620 descr: MYANMAR TELECOMMUNICATION NETWORK PUBLIC COMPANY LIMITED MTN Teleport, Corner of Htee-hlaing 1st Street and Kyansitth No.288/290,MWEA Tower,R702,Shwedagon Pagoda,Dagon Tsp,YGN,MM mnt-by: MAINT-MTNPCL-MM last-modified: 2024-01-07T03:58:16Z mnt-lower: MAINT-MTNPCL-MM mnt-routes: MAINT-MTNPCL-MM source: APNIC rpki-ov-state: valid route6: 2001:df1:4780::/48 descr: CAT route object for Myanmar Telecommunication Network Public Co.,Ltd. origin: AS139620 mnt-by: MAINT-THIX-CAT-TH changed: catdb [at] cat.net.th 20231215 source: RADB last-modified: 2023-12-15T08:48:54Z rpki-ov-state: valid route6: 2001:df1:4780::/48 origin: AS139620 descr: MYANMAR TELECOMMUNICATION NETWORK PUBLIC COMPANY LIMITED MTN Teleport, Corner of Htee-hlaing 1st Street and Kyansitth No.288/290,MWEA Tower,R702,Shwedagon Pagoda,Dagon Tsp,YGN,MM mnt-by: MAINT-MTNPCL-MM last-modified: 2024-01-07T03:11:55Z source: APNIC rpki-ov-state: valid