These entries are queried from radb.net using whois, you can try my project getting these.
:AS53988 route: 199.167.56.0/22 origin: AS53988 mnt-by: MNT-DDL-30 tech-c: ZRG1-ARIN admin-c: ZRG1-ARIN source: ARIN created: 2020-06-25T01:12:37Z last-modified: 2020-06-25T01:12:37Z descr: MNT-DDL-30 route 199.167.056.000/22 AS53988 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 199.167.56.0/24 origin: AS53988 mnt-by: MNT-DDL-30 tech-c: ZRG1-ARIN admin-c: ZRG1-ARIN source: ARIN created: 2020-06-25T01:06:38Z last-modified: 2020-06-25T01:06:38Z descr: MNT-DDL-30 route 199.167.056.000/24 AS53988 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 199.167.57.0/24 origin: AS53988 mnt-by: MNT-DDL-30 tech-c: ZRG1-ARIN admin-c: ZRG1-ARIN source: ARIN created: 2020-06-25T01:07:15Z last-modified: 2020-06-25T01:07:15Z descr: MNT-DDL-30 route 199.167.057.000/24 AS53988 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 199.167.58.0/24 origin: AS53988 mnt-by: MNT-DDL-30 tech-c: ZRG1-ARIN admin-c: ZRG1-ARIN source: ARIN created: 2020-06-25T01:09:06Z last-modified: 2020-06-25T01:09:06Z descr: MNT-DDL-30 route 199.167.058.000/24 AS53988 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2620:12d:4000::/44 origin: AS53988 mnt-by: MNT-DDL-30 tech-c: ZRG1-ARIN admin-c: ZRG1-ARIN source: ARIN created: 2020-07-21T19:11:35Z last-modified: 2020-07-21T19:11:35Z descr: MNT-DDL-30 route 2620:012D:4000:0000:0000:0000:0000:0000/44 AS53988 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2620:12d:4009::/48 descr: Digi Desert LLC origin: AS53988 mnt-by: MNT-DDL-30 changed: zgiles [at] gmail.com 20170113 source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source