Google App Engine - list of IP addresses?

Question

I know that Google App Engine does not support an application having a static IP address, but I\'d like to know if there is a list or range of IP addresses that an app could

Answer 1

I've created a ruby script for this exact purpose (super simple, easy to update):

https://github.com/stephengroat/whitelist-travisci

Resolv::DNS.open do |dns|
  ress = dns.getresource "_cloud-netblocks.googleusercontent.com", Resolv::DNS::Resource::IN::TXT
  ress.data.scan(/(?<=include:)_cloud-netblocks+\d.googleusercontent.com/).each do |r|
    subress = dns.getresource r, Resolv::DNS::Resource::IN::TXT
    subress.data.scan(/(?<=ip[4|6]:)[^\s]+/).each do |sr|
      puts sr
    end
  end
end