domains.gumroad.com.

production-custom-domains.gumroad.net.

52.70.74.62
ec2-52-70-74-62.compute-1.amazonaws.com
52.0.186.42
ec2-52-0-186-42.compute-1.amazonaws.com
54.164.247.69
ec2-54-164-247-69.compute-1.amazonaws.com

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