These entries are queried from radb.net using whois, you can try my project getting these.
:AS20213 route: 23.135.16.0/23 origin: AS20213 descr: PO Box 373 Gifford IL 61847 United States member-of: RS-GWNET admin-c: HESTE63-ARIN tech-c: HESTE63-ARIN mnt-by: MNT-GW-147 created: 2022-03-11T22:43:07Z last-modified: 2022-03-11T22:43:07Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 23.135.16.0/23 origin: AS20213 descr: Proxy Registration for Gifford Wireless 23.135.16.0/23 mnt-by: MAINT-AS53610 changed: peering [at] metrocomm.com 20210503 #14:54:01Z source: RADB last-modified: 2023-11-13T16:05:31Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 23.135.16.0/24 origin: AS20213 descr: PO Box 373 Gifford IL 61847 United States member-of: RS-GWNET admin-c: HESTE63-ARIN tech-c: HESTE63-ARIN mnt-by: MNT-GW-147 created: 2023-12-05T00:36:09Z last-modified: 2023-12-05T00:36:37Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 23.135.16.0/24 origin: AS20213 descr: GIFFORD-WIRELESS mnt-by: MAINT-AS30036 changed: ezinnel [at] mediacomcc.com 20210601 #13:43:25Z source: RADB last-modified: 2023-11-13T16:05:47Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 23.135.17.0/24 origin: AS20213 descr: PO Box 373 Gifford IL 61847 United States member-of: RS-GWNET admin-c: HESTE63-ARIN tech-c: HESTE63-ARIN mnt-by: MNT-GW-147 created: 2023-12-05T00:37:36Z last-modified: 2023-12-05T00:37:36Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 134.195.142.0/23 origin: AS20213 descr: Proxy Registration for Gifford Wireless 134.195.142.0/23 mnt-by: MAINT-AS53610 changed: peering [at] metrocomm.com 20210503 #14:54:42Z source: RADB last-modified: 2023-11-13T16:05:31Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 134.195.142.0/23 origin: AS20213 descr: PO Box 373 Gifford IL 61847 United States member-of: RS-GWNET admin-c: HESTE63-ARIN tech-c: HESTE63-ARIN mnt-by: MNT-GW-147 created: 2022-03-11T22:42:21Z last-modified: 2022-03-11T22:42:21Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 172.99.160.0/23 origin: AS20213 descr: PO Box 373 Gifford IL 61847 United States member-of: RS-GWNET admin-c: HESTE63-ARIN tech-c: HESTE63-ARIN mnt-by: MNT-GW-147 created: 2022-03-11T22:40:59Z last-modified: 2022-03-11T22:40:59Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 172.99.160.0/23 origin: AS20213 descr: Proxy Registration for Gifford Wireless 172.99.160.0/23 mnt-by: MAINT-AS53610 changed: peering [at] metrocomm.com 20210503 #14:57:42Z source: RADB last-modified: 2023-11-13T16:05:31Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 207.174.88.0/23 origin: AS20213 descr: PO Box 373 Gifford IL 61847 United States member-of: RS-GWNET admin-c: HESTE63-ARIN tech-c: HESTE63-ARIN mnt-by: MNT-GW-147 created: 2023-05-24T19:46:43Z last-modified: 2023-05-24T19:46:43Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2605:4640::/32 origin: AS20213 descr: GIFFORD-WIRELESS mnt-by: MAINT-AS30036 changed: ezinnel [at] mediacomcc.com 20191120 #15:51:20Z source: RADB last-modified: 2023-11-13T15:58:59Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source