These entries are queried from radb.net using whois, you can try my project getting these.
:AS33554 route: 38.112.88.0/24 descr: Neutral Data Block 3 origin: AS33554 mnt-by: MAINT-AS33554 changed: skhosla [at] snickers.org 20050929 #06:48:43(UTC) source: RADB last-modified: 2023-11-13T15:58:59Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 38.116.194.0/24 descr: Neutral Data Block 2 origin: AS33554 mnt-by: MAINT-AS33554 changed: skhosla [at] snickers.org 20050929 #06:49:15(UTC) source: RADB last-modified: 2023-11-13T15:58:59Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 63.142.160.0/20 descr: NETBLK-NDC-6 origin: AS33554 mnt-by: MAINT-AS33554 changed: skhosla [at] neutraldata.com 20110203 #18:00:57Z source: RADB last-modified: 2023-11-13T15:58:59Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 66.51.240.0/20 descr: Neutral Data Block origin: AS33554 mnt-by: maint-as33554 changed: skhosla [at] neutraldata.com 20080630 #15:30:56Z source: RADB last-modified: 2023-11-13T15:58:59Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 67.21.224.0/19 descr: NDCC block 5 origin: AS33554 mnt-by: MAINT-AS33554 changed: skhosla [at] neutraldata.com 20090212 #20:07:39Z source: RADB last-modified: 2023-11-13T15:58:59Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 67.21.231.0/24 descr: NDCC origin: AS33554 mnt-by: MAINT-AS33554 changed: skhosla [at] neutraldata.com 20120411 #14:16:12Z source: RADB last-modified: 2023-11-13T15:58:59Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 67.21.241.0/24 descr: NDCC origin: AS33554 mnt-by: MAINT-AS33554 changed: skhosla [at] neutraldata.com 20120411 #14:16:28Z source: RADB last-modified: 2023-11-13T15:58:59Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 204.14.16.0/22 descr: Neutral Data Block 3 origin: AS33554 mnt-by: MAINT-AS33554 changed: skhosla [at] snickers.org 20050929 #06:44:31(UTC) source: RADB last-modified: 2023-11-13T15:58:59Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 204.16.200.0/21 descr: Neutral Data Block 4 origin: AS33554 mnt-by: MAINT-AS33554 changed: skhosla [at] snickers.org 20051107 #22:55:45(UTC) source: RADB last-modified: 2023-11-13T15:58:59Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.71.112.0/21 descr: NDCC Block origin: AS33554 mnt-by: MAINT-AS33554 changed: skhosla [at] snickers.org 20061113 #21:32:21(UTC) source: RADB last-modified: 2023-11-13T15:58:59Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2001:4938::/32 descr: NDCC-IPv6-BLK1 origin: AS33554 mnt-by: MAINT-AS33554 changed: skhosla [at] neutraldata.com 20131115 #21:32:04Z source: RADB last-modified: 2023-11-13T15:58:59Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source