These entries are queried from radb.net using whois, you can try my project getting these.
:AS16733 route: 155.64.0.0/16 descr: Symantec's BGP to Level3 origin: AS16733 mnt-by: SYMANTEC-MAINT changed: aattia [at] symantec.com 20011005 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 155.64.11.0/24 descr: NortonLifeLock Inc. descr: 7135 S Decatur Blvd descr: Las Vegas, NV 89118-4376 descr: US origin: AS16733 mnt-by: MNT-SYMN changed: dl-it-nlok-networkservices [at] nortonlifelock.com 20210316 source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 155.64.12.0/24 descr: NortonLifeLock Inc. descr: 1905 Lunt Ave descr: Elk Grove Village, IL 60007 descr: US origin: AS16733 mnt-by: MNT-SYMN changed: dl-it-nlok-networkservices [at] nortonlifelock.com 20210316 source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 155.64.16.0/23 descr: SYMC descr: Ashburn descr: US origin: AS16733 mnt-by: MNT-SYMN changed: dl-it-ip-admin [at] symantec.com 20161015 source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 155.64.33.0/24 descr: NortonLifeLock Inc. descr: 900 Corporate Pointe, Culver City, CA 90230 descr: United States descr: US origin: AS16733 mnt-by: MNT-SYMN changed: DL-IT-IP-Admin [at] nortonlifelock.com 20200706 source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 155.64.44.0/24 descr: NortonLifeLock Inc. descr: 900 Corporate Pointe, Culver City, CA 90230 descr: United States descr: US origin: AS16733 mnt-by: MNT-SYMN changed: DL-IT-IP-Admin [at] nortonlifelock.com 20200706 source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 155.64.56.0/24 descr: SYMC descr: Ashburn descr: US origin: AS16733 mnt-by: MNT-SYMN changed: dl-it-ip-admin [at] symantec.com 20161015 source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 155.64.63.0/24 descr: SYMC descr: Ashburn descr: US origin: AS16733 mnt-by: MNT-SYMN changed: dl-it-ip-admin [at] symantec.com 20161015 source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 155.64.91.0/24 descr: NortonLifeLock Inc. descr: 43940 Digital Loudoun Plaza, Building G descr: Ashburn, VA 20147 descr: US origin: AS16733 mnt-by: MNT-SYMN changed: dl-it-nlok-networkservices [at] nortonlifelock.com 20200310 source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 155.64.138.0/24 descr: SYMC descr: Ashburn descr: US origin: AS16733 mnt-by: MNT-SYMN changed: dl-it-ip-admin [at] symantec.com 20161015 source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 155.64.146.0/23 descr: NortonLifeLock Inc. descr: 900 Corporate Pointe, Culver City, CA 90230 descr: United States descr: US origin: AS16733 mnt-by: MNT-SYMN changed: DL-IT-IP-Admin [at] nortonlifelock.com 20200706 source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 155.64.146.0/24 descr: NortonLifeLock Inc. descr: 900 Corporate Pointe, Culver City, CA 90230 descr: United States descr: US origin: AS16733 mnt-by: MNT-SYMN changed: DL-IT-IP-Admin [at] nortonlifelock.com 20200706 source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 166.98.71.0/24 descr: Proxy registration to prevent harm from ARIN-NONAUTH shutdown origin: AS16733 mnt-by: MAINT-AS7034 changed: kennethfinnegan2007 [at] gmail.com 20220404 source: ALTDB rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 166.98.242.0/23 descr: Proxy registration to prevent harm from ARIN-NONAUTH shutdown origin: AS16733 mnt-by: MAINT-AS7034 changed: kennethfinnegan2007 [at] gmail.com 20220404 source: ALTDB rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 198.6.48.0/20 descr: Symantec's BGP to Level3 origin: AS16733 mnt-by: SYMANTEC-MAINT changed: aattia [at] symantec.com 20011005 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 199.43.186.0/23 descr: Symantec Australia origin: AS16733 notify: routemaster [at] uecomm.net.au mnt-by: MAINT-AS10223 changed: bgpadmin [at] uecomm.com.au 20070507 source: RADB last-modified: 2023-11-13T15:41:18Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 216.10.192.0/20 descr: Proxy-registered route object origin: AS16733 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 20070501 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source