These entries are queried from radb.net using whois, you can try my project getting these.
:AS33703 route: 147.4.0.0/16 descr: Hofstra University origin: AS33703 mnt-by: MAINT-AS27506 changed: rmaddula [at] lightower.com 20160224 source: RADB last-modified: 2023-11-13T15:48:45Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 147.4.0.0/17 descr: Proxy-registered route object origin: AS33703 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 20070628 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 147.4.0.0/17 origin: AS33703 descr: Proxy registration for Hofstra University admin-c: William Owens tech-c: NYSERNet NOC remarks: This is a proxy registration by NYSERNet on behalf of one of our member campuses. For changes or removal, contact noc [at] nysernet.org notify: noc [at] nysernet.org notify: Robert.Taurozzi [at] hofstra.edu mnt-by: MAINT-AS3754 changed: owens [at] nysernet.org 20201010 #17:39:45Z source: RADB last-modified: 2023-11-13T16:02:24Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 147.4.128.0/17 descr: Proxy-registered route object origin: AS33703 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 20070628 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 147.4.128.0/17 origin: AS33703 descr: Proxy registration for Hofstra University admin-c: William Owens tech-c: NYSERNet NOC remarks: This is a proxy registration by NYSERNet on behalf of one of our member campuses. For changes or removal, contact noc [at] nysernet.org notify: noc [at] nysernet.org mnt-by: MAINT-AS3754 changed: owens [at] nysernet.org 20201010 #17:41:39Z source: RADB last-modified: 2023-11-13T16:02:24Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2620:10a:d000::/44 origin: AS33703 descr: Proxy registration for Hofstra University admin-c: William Owens tech-c: NYSERNet NOC remarks: This is a proxy registration by NYSERNet on behalf of one of our member campuses. For changes or removal, contact noc [at] nysernet.org notify: noc [at] nysernet.org mnt-by: MAINT-AS3754 changed: owens [at] nysernet.org 20201010 #17:44:40Z source: RADB last-modified: 2023-11-13T16:02:24Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source