These entries are queried from radb.net using whois, you can try my project getting these.
:AS26211 route: 66.159.227.0/24 origin: AS26211 descr: Proofpoint Inc. admin-c: NETWO2061-ARIN tech-c: NETWO2061-ARIN mnt-by: MNT-PROOF created: 2023-06-05T19:39:05Z last-modified: 2023-06-05T19:39:05Z source: ARIN rpki-ov-state: valid route: 67.231.144.0/24 descr: Proofpoint Inc. origin: AS26211 mnt-by: MNT-PROOF changed: arin-management [at] proofpoint.com 20160315 source: ARIN rpki-ov-state: valid route: 67.231.145.0/24 descr: Proofpoint Inc. origin: AS26211 mnt-by: MNT-PROOF changed: arin-management [at] proofpoint.com 20160315 source: ARIN rpki-ov-state: valid route: 67.231.146.0/24 descr: Proofpoint Inc. origin: AS26211 mnt-by: MNT-PROOF changed: arin-management [at] proofpoint.com 20160315 source: ARIN rpki-ov-state: valid route: 67.231.147.0/24 descr: Proofpoint Inc. origin: AS26211 mnt-by: MNT-PROOF changed: arin-management [at] proofpoint.com 20160315 source: ARIN rpki-ov-state: valid route: 67.231.148.0/24 descr: Proofpoint Inc. origin: AS26211 mnt-by: MNT-PROOF changed: arin-management [at] proofpoint.com 20160315 source: ARIN rpki-ov-state: valid route: 67.231.149.0/24 descr: Proofpoint Inc. origin: AS26211 mnt-by: MNT-PROOF changed: arin-management [at] proofpoint.com 20160315 source: ARIN rpki-ov-state: valid route: 67.231.150.0/24 descr: Proofpoint Inc. origin: AS26211 mnt-by: MNT-PROOF changed: arin-management [at] proofpoint.com 20180605 source: ARIN rpki-ov-state: valid route: 67.231.151.0/24 descr: Proofpoint Inc. origin: AS26211 mnt-by: MNT-PROOF changed: arin-management [at] proofpoint.com 20160518 source: ARIN rpki-ov-state: valid route: 67.231.158.0/24 descr: Proofpoint Inc. origin: AS26211 mnt-by: MNT-PROOF changed: arin-management [at] proofpoint.com 20160516 source: ARIN rpki-ov-state: valid route: 67.231.159.0/24 descr: Proofpoint Inc. origin: AS26211 mnt-by: MNT-PROOF changed: arin-management [at] proofpoint.com 20180605 source: ARIN rpki-ov-state: valid route: 148.163.144.0/24 descr: Proofpoint Inc. origin: AS26211 mnt-by: MNT-PROOF changed: arin-management [at] proofpoint.com 20180706 source: ARIN rpki-ov-state: valid route: 148.163.146.0/24 descr: Proofpoint Inc. origin: AS26211 mnt-by: MNT-PROOF changed: arin-management [at] proofpoint.com 20180307 source: ARIN rpki-ov-state: valid route: 148.163.147.0/24 descr: Proofpoint Inc. origin: AS26211 mnt-by: MNT-PROOF changed: arin-management [at] proofpoint.com 20180307 source: ARIN rpki-ov-state: valid route: 148.163.148.0/24 descr: Proofpoint Inc. origin: AS26211 mnt-by: MNT-PROOF changed: arin-management [at] proofpoint.com 20160315 source: ARIN rpki-ov-state: valid route: 148.163.149.0/24 descr: Proofpoint Inc. origin: AS26211 mnt-by: MNT-PROOF changed: arin-management [at] proofpoint.com 20160315 source: ARIN rpki-ov-state: valid route: 148.163.150.0/24 descr: Proofpoint Inc. origin: AS26211 mnt-by: MNT-PROOF changed: arin-management [at] proofpoint.com 20180307 source: ARIN rpki-ov-state: valid route: 148.163.151.0/24 descr: Proofpoint Inc. origin: AS26211 mnt-by: MNT-PROOF changed: arin-management [at] proofpoint.com 20180307 source: ARIN rpki-ov-state: valid route: 148.163.156.0/24 descr: Proofpoint Inc. origin: AS26211 mnt-by: MNT-PROOF changed: arin-management [at] proofpoint.com 20160315 source: ARIN rpki-ov-state: valid route: 148.163.157.0/24 descr: Proofpoint Inc. origin: AS26211 mnt-by: MNT-PROOF changed: arin-management [at] proofpoint.com 20160315 source: ARIN rpki-ov-state: valid route: 198.60.24.0/24 descr: Comcast Cable Communications, Inc. 1800 Bishops Gate Blvd Mt Laurel, NJ 08054 origin: AS26211 remarks: Proxy add for customer Proofpoint, Inc. mnt-by: MAINT-AS7922 changed: chris_johnson8 [at] cable.comcast.com 20171213 source: RADB last-modified: 2023-11-13T15:54:23Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 205.220.160.0/24 descr: Proofpoint Inc. origin: AS26211 mnt-by: MNT-PROOF changed: arin-management [at] proofpoint.com 20190405 source: ARIN rpki-ov-state: valid route: 205.220.161.0/24 descr: Proofpoint Inc. origin: AS26211 mnt-by: MNT-PROOF changed: arin-management [at] proofpoint.com 20190405 source: ARIN rpki-ov-state: valid route: 205.220.162.0/24 descr: Proofpoint Inc. origin: AS26211 mnt-by: MNT-PROOF changed: arin-management [at] proofpoint.com 20190405 source: ARIN rpki-ov-state: valid route: 205.220.163.0/24 descr: Proofpoint Inc. origin: AS26211 mnt-by: MNT-PROOF changed: arin-management [at] proofpoint.com 20190405 source: ARIN rpki-ov-state: valid route: 205.220.164.0/24 descr: Proofpoint Inc. origin: AS26211 mnt-by: MNT-PROOF changed: arin-management [at] proofpoint.com 20190405 source: ARIN rpki-ov-state: valid route: 205.220.165.0/24 descr: Proofpoint Inc. origin: AS26211 mnt-by: MNT-PROOF changed: arin-management [at] proofpoint.com 20190405 source: ARIN rpki-ov-state: valid route: 205.220.166.0/24 descr: Proofpoint Inc. origin: AS26211 mnt-by: MNT-PROOF changed: arin-management [at] proofpoint.com 20190405 source: ARIN rpki-ov-state: valid route: 205.220.167.0/24 descr: Proofpoint Inc. origin: AS26211 mnt-by: MNT-PROOF changed: arin-management [at] proofpoint.com 20200424 source: ARIN rpki-ov-state: valid route: 205.220.168.0/24 descr: Proofpoint Inc. origin: AS26211 mnt-by: MNT-PROOF changed: arin-management [at] proofpoint.com 20200424 source: ARIN rpki-ov-state: valid route: 205.220.169.0/24 descr: Proofpoint Inc. origin: AS26211 mnt-by: MNT-PROOF changed: arin-management [at] proofpoint.com 20200424 source: ARIN rpki-ov-state: valid route: 205.220.170.0/24 origin: AS26211 descr: 2020-10-08 admin-c: NETWO2061-ARIN tech-c: NETWO2061-ARIN mnt-by: MNT-PROOF created: 2020-10-08T14:56:22Z last-modified: 2023-08-07T16:10:35Z source: ARIN rpki-ov-state: valid route: 205.220.171.0/24 origin: AS26211 descr: 2020-10-08 admin-c: NETWO2061-ARIN tech-c: NETWO2061-ARIN mnt-by: MNT-PROOF created: 2020-10-08T14:56:43Z last-modified: 2023-08-07T16:10:35Z source: ARIN rpki-ov-state: valid route: 205.220.186.0/24 origin: AS26211 descr: MNT-PROOF route 205.220.186.000/24 AS26211 admin-c: NETWO2061-ARIN tech-c: NETWO2061-ARIN mnt-by: MNT-PROOF created: 2021-01-04T22:30:51Z last-modified: 2023-08-07T16:10:35Z source: ARIN rpki-ov-state: valid route: 205.220.190.0/24 descr: Proofpoint Inc. origin: AS26211 mnt-by: MNT-PROOF changed: arin-management [at] proofpoint.com 20200227 source: ARIN rpki-ov-state: valid route: 205.220.191.0/24 descr: Proofpoint Inc. origin: AS26211 mnt-by: MNT-PROOF changed: arin-management [at] proofpoint.com 20200227 source: ARIN rpki-ov-state: valid route: 208.84.65.0/24 descr: Proofpoint Inc. origin: AS26211 mnt-by: MNT-PROOF changed: arin-management [at] proofpoint.com 20160315 source: ARIN rpki-ov-state: valid route: 208.84.66.0/24 descr: Proofpoint Inc. origin: AS26211 mnt-by: MNT-PROOF changed: arin-management [at] proofpoint.com 20160315 source: ARIN rpki-ov-state: valid route: 208.86.203.0/24 descr: Proofpoint Inc. origin: AS26211 mnt-by: MNT-PROOF changed: arin-management [at] proofpoint.com 20180103 source: ARIN rpki-ov-state: valid route6: 2620:100:9000::/47 descr: Proofpoint Inc. origin: AS26211 mnt-by: MNT-PROOF changed: arin-management [at] proofpoint.com 20170615 source: ARIN rpki-ov-state: valid route6: 2620:100:900c::/48 origin: AS26211 descr: 925 W Maude Ave Sunnyvale CA 94085 United States admin-c: NETWO2061-ARIN tech-c: NETWO2061-ARIN mnt-by: MNT-PROOF created: 2022-08-24T16:43:50Z last-modified: 2022-08-24T16:43:50Z source: ARIN rpki-ov-state: valid route6: 2620:100:900d::/48 origin: AS26211 descr: 925 W Maude Ave Sunnyvale CA 94085 United States admin-c: NETWO2061-ARIN tech-c: NETWO2061-ARIN mnt-by: MNT-PROOF created: 2022-08-24T16:42:34Z last-modified: 2022-08-24T16:42:34Z source: ARIN rpki-ov-state: valid