These entries are queried from radb.net using whois, you can try my project getting these.
:AS31773 route: 199.48.156.0/23 descr: Core BTS, Inc. descr: 3001 W Beltline Hwy descr: Madison, WI 53713 descr: US origin: AS31773 mnt-by: MNT-CB-1 changed: ip-admin [at] corebts.com 20101103 source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 199.48.158.0/23 descr: Core BTS, Inc. descr: 3001 W Beltline Hwy descr: Madison, WI 53713 descr: US origin: AS31773 mnt-by: MNT-CB-1 changed: ip-admin [at] corebts.com 20101103 source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 199.48.158.0/24 mnt-by: MAINT-RR origin: AS31773 descr: RR-RC-CHTR-CORE BTS INC-WI admin-c: IPADD1-ARIN tech-c: IPADD1-ARIN changed: PublicIPAdressing [at] charter.com 20230802 source: RADB last-modified: 2023-11-13T16:17:53Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source