This assumes you are using the current version of the operating system (iOS 10.2.1 as of this post)

What to do:

  1. On the home screen, tap Settings.
  2. Select WiFi to open a list of currently available wireless networks.
  3. Locate the wireless network to which you are currently connected in the list, then tap on the blue circle with a white arrow that appears to the right of the network name.
  4. The IP Address field should be the first field listed under the DHCP tab.
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