These entries are queried from radb.net using whois, you can try my project getting these.
:AS138651 route: 103.135.136.0/24 descr: Maintained By Spidernet origin: AS138651 mnt-by: MAINT-SPIDERNET-BD country: BD remarks: IP for Spidernet, Bangladesh last-modified: 2019-03-11T09:23:42Z source: APNIC rpki-ov-state: valid route: 103.135.137.0/24 descr: Maintained By Spidernet origin: AS138651 mnt-by: MAINT-SPIDERNET-BD country: BD remarks: IP for Spidernet, Bangladesh last-modified: 2019-03-11T09:24:43Z source: APNIC rpki-ov-state: valid