These entries are queried from radb.net using whois, you can try my project getting these.
:AS40468 route: 208.76.112.0/21 descr: Montgomery County Government, Maryland 100 Maryland Ave. Suite 300, Rockville, MD 20850 US remarks: proxy-registered object for customer Direct inquiries to michaelo [at] tripointam.com origin: AS40468 mnt-by: MAINT-AS6079 changed: terrence.hunter [at] rcn.com 20070531 source: RADB last-modified: 2023-11-13T15:39:41Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.76.112.0/21 origin: AS40468 descr: 100 Maryland Ave. Suite 300 Rockville MD 20850 United States admin-c: MDG40-ARIN tech-c: DCH132-ARIN tech-c: RGS11-ARIN mnt-by: MNT-MCGM created: 2022-10-14T15:42:33Z last-modified: 2022-10-14T15:42:33Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.76.112.0/24 descr: Proxy object registered for Montgomery County, MD origin: AS40468 mnt-by: MAINT-AS7784 changed: noc [at] atlantech.net 20140227 #14:31:39Z source: RADB last-modified: 2023-11-13T15:46:15Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.76.113.0/24 descr: Montgomery County Government, Maryland 100 Maryland Ave. Suite 300, Rockville, MD 20850 origin: AS40468 mnt-by: MAINT-AS7784 changed: noc [at] atlantech.net 20090715 #09:39:39Z source: RADB last-modified: 2023-11-13T15:40:00Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.76.115.0/24 descr: Proxy object registered for Montgomery County, MD origin: AS40468 mnt-by: MAINT-AS7784 changed: noc [at] atlantech.net 20140227 #14:31:49Z source: RADB last-modified: 2023-11-13T15:46:15Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.76.116.0/22 descr: Montgomery County Government, Maryland origin: AS40468 mnt-by: MAINT-AS7784 changed: noc [at] atlantech.net 20090814 #18:14:45Z source: RADB last-modified: 2023-11-13T15:40:01Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.76.116.0/24 descr: Proxy object registered for Montgomery County, MD origin: AS40468 mnt-by: MAINT-AS7784 changed: noc [at] atlantech.net 20140227 #14:32:00Z source: RADB last-modified: 2023-11-13T15:46:15Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.76.117.0/24 descr: Proxy object registered for Montgomery County, MD origin: AS40468 mnt-by: MAINT-AS7784 changed: noc [at] atlantech.net 20140227 #14:32:08Z source: RADB last-modified: 2023-11-13T15:46:15Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.89.78.0/24 descr: EMBARQ HSD origin: AS40468 mnt-by: EMBARQ-MNT changed: casey.w.grover [at] centurylink.com 20100806 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.89.79.0/24 descr: EMBARQ HSD origin: AS40468 mnt-by: EMBARQ-MNT changed: casey.w.grover [at] centurylink.com 20100806 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 209.190.194.0/24 descr: Proxy object for Montgomery County Government origin: AS40468 mnt-by: MAINT-AS7784 changed: noc [at] atlantech.net 20181019 #15:24:37Z source: RADB last-modified: 2023-11-13T15:54:59Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source