These entries are queried from radb.net using whois, you can try my project getting these.
:AS23521 route: 12.189.176.0/24 descr: Akamai Technologies, Inc origin: AS23521 mnt-by: MAINT-AS32787 source: RADB changed: ameyer [at] akamai.com 20211220 last-modified: 2023-11-13T16:13:35Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 216.131.0.0/20 origin: AS23521 descr: Finastra Merchant Services, Inc. admin-c: NETWO1675-ARIN tech-c: NETWO1675-ARIN mnt-by: MNT-BSERV-1 created: 2022-03-10T20:52:25Z last-modified: 2022-03-10T23:29:25Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 216.131.4.0/22 origin: AS23521 descr: Akamai Technologies, Inc. mnt-by: MAINT-AS32787 changed: cromero [at] akamai.com 20210521 #22:00:32Z source: RADB last-modified: 2023-11-13T16:13:35Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 216.131.9.0/24 descr: Integra Telecom Route Object origin: AS23521 remarks: Integra Telecom Customer remarks: contacts per RFC2142: remarks: Abuse / UCE report abuse [at] integratelecom.com remarks: SWIP Issues ipadmin [at] integratelecom.com notify: bgp [at] integra.net mnt-by: MAINT-AS7385 changed: tony.radzwon [at] integratelecom.com 20111201 source: RADB last-modified: 2023-11-13T16:11:46Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 216.131.12.0/22 descr: VW-CUST-84600 origin: AS23521 mnt-by: MAINT-FLEXENTIAL changed: routing [at] viawest.net 20130214 #18:28:45Z source: RADB last-modified: 2023-11-13T15:57:06Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source