These entries are queried from radb.net using whois, you can try my project getting these.
:AS45813 route: 203.217.136.0/23 descr: ISG NovaSoft Technologies Limited(ISGN) descr: KPO & Product support descr: Bangalore,Chennai & Kolkata country: IN origin: AS45813 mnt-by: MAINT-IN-ISGN last-modified: 2016-06-23T02:35:54Z source: APNIC rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.217.136.0/23 descr: ISGN Limited - RCOM customer origin: AS45813 mnt-by: MAINT-AS18101 changed: ip.nnoc [at] relianceada.com 20090826 #05:04:59Z source: RADB last-modified: 2023-11-13T15:47:45Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.217.136.0/24 descr: ISG NovaSoft Technologies Limited(ISGN) descr: KPO & Product support descr: Bangalore,Chennai & Kolkata country: IN origin: AS45813 mnt-by: MAINT-IN-ISGN last-modified: 2009-08-21T11:21:36Z source: APNIC rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.217.136.0/24 descr: ISGN Ltd - RCOM customer origin: AS45813 mnt-by: MAINT-AS18101 changed: ip.nnoc [at] relianceada.com 20090826 #05:13:42Z source: RADB last-modified: 2023-11-13T15:47:45Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.217.137.0/24 descr: ISG NovaSoft Technologies Limited(ISGN) descr: KPO & Product support descr: Bangalore,Chennai & Kolkata country: IN origin: AS45813 mnt-by: MAINT-IN-ISGN last-modified: 2009-08-21T11:21:36Z source: APNIC rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.217.137.0/24 descr: ISGN Ltd - RCOM customer origin: AS45813 mnt-by: MAINT-AS18101 changed: ip.nnoc [at] relianceada.com 20090826 #05:14:35Z source: RADB last-modified: 2023-11-13T15:47:45Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source