These entries are queried from radb.net using whois, you can try my project getting these.
:AS137904 route: 147.182.0.0/17 descr: AT&T Worldwide Telecommunications Services Singapore Pte Ltd_Black and Veatch origin: AS137904 mnt-by: MAINT-EQUINIXSGW changed: mesclamado [at] ap.equinix.com 20200429 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 147.182.76.0/24 descr: AT&T origin: AS137904 mnt-by: MAINT-EQUINIXSGW changed: meballa [at] ap.equinix.com 20200615 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source