These entries are queried from radb.net using whois, you can try my project getting these.
:AS139956 route: 103.142.21.0/24 origin: AS139956 descr: Indonesia Network Information Center APJII - Cyber Building 11th Floor Jl. Kuningan Barat No. 8 mnt-by: MAINT-ID-NATANET last-modified: 2020-02-05T07:44:17Z source: APNIC rpki-ov-state: valid route: 103.142.21.0/24 origin: AS139956 descr: Indonesia Network Information Center APJII - Cyber Building 11th Floor Jl. Kuningan Barat No. 8 mnt-by: MAINT-ID-NATANET last-modified: 2020-06-02T08:33:46Z source: IDNIC rpki-ov-state: valid