These entries are queried from radb.net using whois, you can try my project getting these.
:AS11374 route: 208.77.4.0/22 descr: BuzzBroadband/Pandora Networks origin: AS11374 mnt-by: PANDORA-MNT changed: kristopher.harig [at] level3.com 20070503 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.77.4.0/24 descr: Panterra DC-1100 origin: AS11374 notify: jstalder [at] panterranetworks.com mnt-by: MAINT-PANTERRA-OPS changed: jstalder [at] panterranetworks.com 20200720 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.77.5.0/24 descr: Panterra DC-1100 origin: AS11374 notify: jstalder [at] panterranetworks.com mnt-by: MAINT-PANTERRA-OPS changed: jstalder [at] panterranetworks.com 20200720 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.77.6.0/24 descr: Panterra DC-44664 origin: AS11374 notify: jstalder [at] panterranetworks.com mnt-by: MAINT-PANTERRA-OPS changed: jstalder [at] panterranetworks.com 20200720 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.77.7.0/24 descr: Panterra DC-beta origin: AS11374 notify: operations [at] panterranetworks.com mnt-by: MAINT-PANTERRA-OPS changed: jstalder [at] panterranetworks.com 20200413 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2602:fe6f:1::/48 descr: Panterra DCW origin: AS11374 notify: operations [at] panterranetworks.com mnt-by: MAINT-PANTERRA-OPS changed: jstalder [at] panterranetworks.com 20220330 source: NTTCOM last-modified: 2022-03-30T19:29:46Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2602:fe6f:2::/48 descr: Panterra DC-44664 origin: AS11374 notify: operations [at] panterranetworks.com mnt-by: MAINT-PANTERRA-OPS changed: jstalder [at] panterranetworks.com 20180613 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2602:fe6f:3::/48 descr: Panterra DC-beta origin: AS11374 notify: operations [at] panterranetworks.com mnt-by: MAINT-PANTERRA-OPS changed: jstalder [at] panterranetworks.com 20200414 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source