fetch a list of Google Compute Engine IPs using DNS lookup
gce-ips list --format=json
gce-ips check 104.196.27.39
npm i gce-ips -g
list: return a list of GCE IPs in JSON or text format.check: check whether an IP is GCE:
$? = 0 if IP is in range.$? = 1 if IP is out of range.ISC