These entries are queried from radb.net using whois, you can try my project getting these.
:AS398192 route: 199.48.0.0/22 origin: AS398192 descr: Arkansas Department of Transportation + Primary location 10324 Interstate 30 Little Rock AR 72209 United States + Secondary Location 808 Frontier Road Barling AR 72923 United States member-of: AS398192:RS-ASHTD-V4-ROUTES admin-c: PERON-ARIN tech-c: PERON-ARIN mnt-by: MNT-ASHTD created: 2023-02-16T14:49:30Z last-modified: 2023-02-16T15:33:35Z source: ARIN rpki-ov-state: valid route: 199.48.0.0/24 origin: AS398192 descr: Arkansas Department of Transportation + Primary location 10324 Interstate 30 Little Rock AR 72209 United States + Secondary Location 808 Frontier Road Barling AR 72923 United States member-of: AS398192:RS-ASHTD-V4-ROUTES admin-c: PERON-ARIN tech-c: PERON-ARIN mnt-by: MNT-ASHTD created: 2023-02-16T15:36:13Z last-modified: 2023-02-16T15:36:13Z source: ARIN rpki-ov-state: valid route: 199.48.1.0/24 origin: AS398192 descr: Arkansas Department of Transportation + Primary location 10324 Interstate 30 Little Rock AR 72209 United States + Secondary Location 808 Frontier Road Barling AR 72923 United States member-of: AS398192:RS-ASHTD-V4-ROUTES admin-c: PERON-ARIN tech-c: PERON-ARIN mnt-by: MNT-ASHTD created: 2023-02-16T15:37:23Z last-modified: 2023-02-16T15:37:23Z source: ARIN rpki-ov-state: valid route: 199.48.3.0/24 origin: AS398192 descr: Arkansas Department of Transportation + Primary location 10324 Interstate 30 Little Rock AR 72209 United States + Secondary Location 808 Frontier Road Barling AR 72923 United States member-of: AS398192:RS-ASHTD-V4-ROUTES admin-c: PERON-ARIN tech-c: PERON-ARIN mnt-by: MNT-ASHTD created: 2023-02-16T15:36:52Z last-modified: 2023-02-16T15:36:52Z source: ARIN rpki-ov-state: valid