These entries are queried from radb.net using whois, you can try my project getting these.
:AS16515 route: 74.6.232.0/24 descr: Yahoo KTC origin: AS16515 notify: network [at] yahooinc.com mnt-by: MAINT-YAHOO changed: jasonroh [at] yahooinc.com 20220124 source: RADB last-modified: 2023-11-13T16:09:08Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 209.73.160.0/20 descr: altavista route in San Jose origin: AS16515 mnt-by: ALTAVISTA-MNT changed: Steve.cordova [at] level3.com 20000824 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 209.73.176.0/20 descr: NYC route for Alta Vista origin: AS16515 mnt-by: ALTAVISTAL3-MNT changed: steve.cordova [at] level3.com 20000824 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 209.191.96.0/24 descr: DXS datacenter origin: AS16515 remarks: for DXS datacenter notify: network [at] yahoo-inc.com mnt-by: MAINT-YAHOO changed: vgade [at] yahoo-inc.com 20131025 source: RADB last-modified: 2023-11-13T15:45:50Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2001:4998:34::/48 descr: Yahoo DXS origin: AS16515 notify: network [at] yahoo-inc.com mnt-by: MAINT-YAHOO changed: spujanis [at] yahoo-inc.com 20150520 source: RADB last-modified: 2023-11-13T15:47:27Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source