These entries are queried from radb.net using whois, you can try my project getting these.
:AS136937 route: 103.99.128.0/22 origin: AS136937 descr: Chittagong University of Engineering & Technology Chittagong University of Engineering & Technology mnt-by: MAINT-CUET-BD last-modified: 2017-08-26T15:56:11Z source: APNIC rpki-ov-state: valid route: 103.99.128.0/23 origin: AS136937 descr: Chittagong University of Engineering & Technology Chittagong University of Engineering & Technology mnt-by: MAINT-CUET-BD last-modified: 2017-08-26T15:56:11Z source: APNIC rpki-ov-state: valid route: 103.99.128.0/24 origin: AS136937 descr: Chittagong University of Engineering & Technology Chittagong University of Engineering & Technology mnt-by: MAINT-CUET-BD last-modified: 2017-08-26T15:56:12Z source: APNIC rpki-ov-state: valid route: 103.99.129.0/24 origin: AS136937 descr: Chittagong University of Engineering & Technology Chittagong University of Engineering & Technology mnt-by: MAINT-CUET-BD last-modified: 2017-08-26T15:56:12Z source: APNIC rpki-ov-state: valid route: 103.99.130.0/23 origin: AS136937 descr: Chittagong University of Engineering & Technology Chittagong University of Engineering & Technology mnt-by: MAINT-CUET-BD last-modified: 2017-08-26T15:56:12Z source: APNIC rpki-ov-state: valid route: 103.99.130.0/24 origin: AS136937 descr: Chittagong University of Engineering & Technology Chittagong University of Engineering & Technology mnt-by: MAINT-CUET-BD last-modified: 2017-08-26T15:56:12Z source: APNIC rpki-ov-state: valid route: 103.99.131.0/24 origin: AS136937 descr: Chittagong University of Engineering & Technology Chittagong University of Engineering & Technology mnt-by: MAINT-CUET-BD last-modified: 2017-08-26T15:56:13Z source: APNIC rpki-ov-state: valid route6: 2401:aec0::/32 origin: AS136937 descr: Chittagong University of Engineering & Technology Chittagong University of Engineering & Technology mnt-by: MAINT-CUET-BD last-modified: 2017-08-26T16:08:27Z source: APNIC rpki-ov-state: valid