These entries are queried from radb.net using whois, you can try my project getting these.
:AS-GORUCK as-set: AS-GORUCK descr: GORUCK LLC members: AS26679 tech-c: HANYE1-ARIN admin-c: HANYE1-ARIN notify: laszlo [at] goruck.com mnt-by: MNT-GL-99 changed: laszlo [at] goruck.com 20130118 source: ARIN