These entries are queried from radb.net using whois, you can try my project getting these.
:AS18749 route: 208.83.128.0/24 descr: Prolexic Technologies, Inc. origin: AS18749 mnt-by: MAINT-AS32787 changed: czunigav [at] akamai.com 20180430 #23:29:38Z source: RADB last-modified: 2023-11-13T16:13:32Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.83.130.0/23 origin: AS18749 descr: Proxy route object remarks: LOA on file notify: smc [at] equinix.com mnt-by: MAINT-AS14609 changed: ahashi [at] equinix.com 20240404 # 1331Z source: RADB last-modified: 2024-04-04T13:31:31Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.83.130.0/24 origin: AS18749 descr: Akamai Technologies, Inc mnt-by: MAINT-AS32787 changed: ameyer [at] akamai.com 20240307 # 0332Z source: RADB last-modified: 2024-03-07T03:32:33Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.83.131.0/24 descr: Prolexic Technologies, Inc. origin: AS18749 mnt-by: MAINT-AS32787 changed: jcalvoch [at] akamai.com 20160513 #17:34:57Z source: RADB last-modified: 2023-11-13T16:13:32Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 216.221.240.0/20 descr: Prolexic Technologies, Inc. origin: AS18749 mnt-by: MAINT-AS32787 notify: hostmaster [at] prolexic.com changed: jbarral [at] akamai.com 20150424 source: RADB last-modified: 2023-11-13T16:13:33Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 216.221.252.0/22 descr: Prolexic Technologies, Inc. origin: AS18749 mnt-by: MAINT-AS32787 notify: hostmaster [at] prolexic.com changed: erodrigu [at] akamai.com 20150526 source: RADB last-modified: 2023-11-13T16:13:33Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 216.221.252.0/23 descr: Prolexic Technologies, Inc. origin: AS18749 mnt-by: MAINT-AS32787 notify: hostmaster [at] prolexic.com changed: jbarral [at] akamai.com 20150425 source: RADB last-modified: 2023-11-13T16:13:33Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source