Maybe I don't get i2p. When I use a VPN or Tor I can go to ipchicken.com or http://ip-check.info/?lang=en and see that my ip address has changed. Is there any way that I can see what ip address I am using when I am using i2p?
I2P is primarily a closed system. You have no Internet address within I2P. There are a few I2P-Internet gateways, however.