These entries are queried from radb.net using whois, you can try my project getting these.
:AS16823 route: 23.252.240.0/20 descr: Nortex Add in origin: AS16823 mnt-by: TLSN-MNT changed: jrobinson2524 [at] gmail.com 20210302 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 23.252.240.0/22 descr: Nortex origin: AS16823 mnt-by: TLSN-MNT changed: jrobinson2524 [at] gmail.com 20210316 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 23.252.244.0/22 descr: Nortex origin: AS16823 mnt-by: TLSN-MNT changed: jrobinson2524 [at] gmail.com 20210316 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 23.252.248.0/22 descr: Nortex origin: AS16823 mnt-by: TLSN-MNT changed: jrobinson2524 [at] gmail.com 20210316 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 23.252.252.0/22 descr: Nortex origin: AS16823 mnt-by: TLSN-MNT changed: jrobinson2524 [at] gmail.com 20210316 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 63.160.156.0/24 descr: Texas Lone Star Network origin: AS16823 mnt-by: MAINT-AS46849 changed: kpack [at] us.ntt.net 20161004 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 63.160.157.0/24 descr: Texas Lone Star Network origin: AS16823 mnt-by: MAINT-AS46849 changed: kpack [at] us.ntt.net 20161004 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 63.160.158.0/24 descr: Texas Lone Star Network origin: AS16823 mnt-by: MAINT-AS46849 changed: kpack [at] us.ntt.net 20161004 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 63.160.159.0/24 descr: Texas Lone Star Network origin: AS16823 mnt-by: MAINT-AS46849 changed: kpack [at] us.ntt.net 20161004 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 65.169.68.0/24 descr: Nortex origin: AS16823 mnt-by: TLSN-MNT changed: jrobinson2524 [at] gmail.com 20210209 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 66.208.98.0/24 origin: AS16823 descr: Nortex admin-c: MWG4-ARIN tech-c: MWG4-ARIN tech-c: SALAZ49-ARIN mnt-by: MNT-WCTW created: 2023-07-19T13:51:00Z last-modified: 2023-07-19T13:51:00Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 66.208.98.0/24 descr: NORTEXNET origin: AS16823 mnt-by: TLSN-MNT changed: jrobinson2524 [at] gmail.com 20230719 source: LEVEL3 last-modified: 2023-07-19T14:32:46Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 66.208.104.0/24 origin: AS16823 descr: Nortex admin-c: MWG4-ARIN tech-c: MWG4-ARIN tech-c: SALAZ49-ARIN mnt-by: MNT-WCTW created: 2023-07-19T13:52:08Z last-modified: 2023-07-19T13:52:08Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 66.208.104.0/24 descr: NORTEXNET origin: AS16823 mnt-by: TLSN-MNT changed: jrobinson2524 [at] gmail.com 20230719 source: LEVEL3 last-modified: 2023-07-19T14:32:46Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 74.84.26.0/23 origin: AS16823 descr: Nortex admin-c: MWG4-ARIN tech-c: MWG4-ARIN tech-c: SALAZ49-ARIN mnt-by: MNT-WCTW created: 2023-07-19T13:45:26Z last-modified: 2023-07-19T13:45:26Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 74.84.26.0/23 descr: NORTEXNET origin: AS16823 mnt-by: TLSN-MNT changed: jrobinson2524 [at] gmail.com 20230719 source: LEVEL3 last-modified: 2023-07-19T14:32:46Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 135.84.152.0/21 descr: update ntx origin: AS16823 mnt-by: TLSN-MNT changed: jrobinson2524 [at] gmail.com 20200519 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 205.240.151.0/24 descr: Texas Lone Star Network origin: AS16823 mnt-by: MAINT-AS46849 changed: kpack [at] us.ntt.net 20161004 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 207.40.146.0/24 descr: Nortex origin: AS16823 mnt-by: TLSN-MNT changed: jrobinson2524 [at] gmail.com 20210209 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 207.40.147.0/24 descr: Nortex origin: AS16823 mnt-by: TLSN-MNT changed: jrobinson2524 [at] gmail.com 20210209 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 209.55.80.0/21 origin: AS16823 descr: Nortex admin-c: MWG4-ARIN tech-c: MWG4-ARIN tech-c: SALAZ49-ARIN mnt-by: MNT-WCTW created: 2023-07-19T13:55:02Z last-modified: 2023-07-19T13:55:02Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 209.55.80.0/22 descr: Nortex origin: AS16823 mnt-by: TLSN-MNT changed: jrobinson2524 [at] gmail.com 20210209 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 209.55.84.0/22 descr: Nortex origin: AS16823 mnt-by: TLSN-MNT changed: jrobinson2524 [at] gmail.com 20210209 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 209.55.112.0/21 origin: AS16823 descr: Nortex admin-c: MWG4-ARIN tech-c: MWG4-ARIN tech-c: SALAZ49-ARIN mnt-by: MNT-WCTW created: 2023-07-19T13:55:42Z last-modified: 2023-07-19T13:55:42Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 209.55.112.0/24 descr: Nortex origin: AS16823 mnt-by: TLSN-MNT changed: jrobinson2524 [at] gmail.com 20210209 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 209.55.113.0/24 descr: NORTEXNET origin: AS16823 mnt-by: TLSN-MNT changed: jrobinson2524 [at] gmail.com 20230417 source: LEVEL3 last-modified: 2023-04-17T16:43:07Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 209.55.114.0/24 descr: Nortex origin: AS16823 mnt-by: TLSN-MNT changed: jrobinson2524 [at] gmail.com 20210209 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 209.55.115.0/24 descr: Nortex origin: AS16823 mnt-by: TLSN-MNT changed: jrobinson2524 [at] gmail.com 20210209 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 209.55.116.0/22 descr: Nortex origin: AS16823 mnt-by: TLSN-MNT changed: jrobinson2524 [at] gmail.com 20210209 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 209.55.120.0/22 descr: NORTEXNET origin: AS16823 mnt-by: TLSN-MNT changed: jrobinson2524 [at] gmail.com 20230719 source: LEVEL3 last-modified: 2023-07-19T14:32:46Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 209.55.120.0/22 origin: AS16823 descr: Nortex admin-c: MWG4-ARIN tech-c: MWG4-ARIN tech-c: SALAZ49-ARIN mnt-by: MNT-WCTW created: 2023-07-19T13:43:53Z last-modified: 2023-07-19T13:43:53Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 216.59.144.0/20 descr: Nortex Add origin: AS16823 mnt-by: TLSN-MNT changed: jrobinson2524 [at] gmail.com 20200517 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source