ipinfo.io - Simple IP address information.
Bulk Email Verifier - Clean up your large mailing lists before you use them. Clean list increases your reputation in MailChimp, AWeber, or Campayn.
ipdata.co - Get the Geolocation, Organisation, Currency, Timezone, Calling Code, Flag, Proxy, Tor and Threat intelligence data from any IPv4 or IPv6 address.
Email Verifier - Email verifier app lets you verify email.
ifconfig.co - What is my IP address? — The best tool to find your own IP address, and information about it.
Email List Verify - The Fastest Way to Improve Email List Deliverability and ROI