These entries are queried from radb.net using whois, you can try my project getting these.
:AS20245 route: 8.10.245.0/24 descr: Vonage Labs origin: AS20245 mnt-by: MAINT-AS17151 changed: irr [at] vonage.com 20110503 #02:38:35Z source: RADB last-modified: 2023-11-13T15:41:18Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 8.30.12.0/24 descr: Vonage DEV origin: AS20245 mnt-by: MAINT-AS17151 changed: irr [at] vonage.com 20140815 #18:14:36Z source: RADB last-modified: 2023-11-13T15:46:37Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 8.30.13.0/24 descr: Vonage-Cloud POC origin: AS20245 mnt-by: MAINT-AS17151 changed: irr [at] vonage.com 20150403 #20:21:41Z source: RADB last-modified: 2023-11-13T15:47:22Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 8.30.14.0/24 descr: Vonage QA origin: AS20245 mnt-by: MAINT-AS17151 changed: irr [at] vonage.com 20140815 #18:13:50Z source: RADB last-modified: 2023-11-13T15:46:37Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 8.30.15.0/24 descr: Vonage QA Labs origin: AS20245 mnt-by: MAINT-AS17151 changed: irr [at] vonage.com 20140815 #19:22:56Z source: RADB last-modified: 2023-11-13T15:46:37Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source