These entries are queried from radb.net using whois, you can try my project getting these.
:AS25739 route: 207.229.96.0/23 descr: Adtran, Inc. origin: AS25739 remarks: Added by API Digital on behalf of Adtran, Inc. mnt-by: API-MNT changed: cadams [at] api-digital.com 20180810 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.61.208.0/24 descr: route update via web origin: AS25739 mnt-by: API-MNT changed: thomas.john [at] level3.com 20090928 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.61.209.0/24 descr: Adtran, Inc. origin: AS25739 remarks: remarks: This route object was created because no existing remarks: route object with the same origin was found, and remarks: since some peers filter based on these objects remarks: this route may be rejected if this object is not created. remarks: mnt-by: MAINT-AS19151 changed: ipadmin [at] bboi.net 20080113 source: BBOI rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.61.209.0/24 descr: ROUTE OBJECT origin: AS25739 mnt-by: API-MNT changed: ipadmin [at] api-digital.com 20100224 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.251.151.0/24 descr: Proxy-registered route object origin: AS25739 remarks: auto-generated route object remarks: this next line gives the robot something to recognize remarks: L'enfer, c'est les autres remarks: remarks: This route object is for a Level 3 customer route remarks: which is being exported under this origin AS. remarks: remarks: This route object was created because no existing remarks: route object with the same origin was found, and remarks: since some Level 3 peers filter based on these objects remarks: this route may be rejected if this object is not created. remarks: remarks: Please contact dl-routing [at] lumen.com if you have any remarks: questions regarding this object. mnt-by: LEVEL3-MNT changed: roy [at] Level3.net 20050824 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 216.206.86.0/24 descr: ROUTE OBJECT origin: AS25739 mnt-by: API-MNT changed: ipadmin [at] api-digital.com 20130115 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2001:408:0:5::/64 descr: Adtran, Inc. origin: AS25739 remarks: Added by API Digital on behalf of Adtran, Inc. mnt-by: API-MNT changed: cadams [at] api-digital.com 20180810 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2620:106:a000::/44 descr: Adtran, Inc. origin: AS25739 remarks: Added by API Digital on behalf of Adtran, Inc. mnt-by: API-MNT changed: cadams [at] api-digital.com 20180810 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source