These entries are queried from radb.net using whois, you can try my project getting these.
:AS25732 route: 208.53.248.0/24 origin: AS25732 descr: Vervent 10182 Telesis Court San Diego CA 92121 United States admin-c: MRL15-ARIN tech-c: BAH13-ARIN tech-c: DAVIS1862-ARIN tech-c: ITNOT-ARIN tech-c: MENNE15-ARIN tech-c: MPM71-ARIN tech-c: MRL15-ARIN mnt-by: MNT-TOTAL-43 created: 2022-04-14T20:09:16Z last-modified: 2022-11-30T21:07:29Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.53.248.0/24 descr: SDNET on behalf of Total Card origin: AS25732 mnt-by: MAINT-AS13576 changed: chris.schuette [at] sdncommunications.com 20180919 #19:46:09Z source: RADB last-modified: 2023-11-13T15:54:43Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source