domains.gumroad.com.

production-custom-domains.gumroad.net.

35.174.126.80
ec2-35-174-126-80.compute-1.amazonaws.com
54.237.146.20
ec2-54-237-146-20.compute-1.amazonaws.com
54.164.88.113
ec2-54-164-88-113.compute-1.amazonaws.com

domains.gumroad.com.
production-custom-domains.gumroad.net.