Youp IP Address:

Enter IP Address or Host Name to check. What is an IP address?
E.g. or

This check provides the following information with just one click:
  • IP Address that you are using
    What is my IP address? This question is no longer hard to answer!
  • DNS Lookup (IP Lookup)
    The DNS lookup converts a host name to Internet IP address of the form
  • Reverse DNS Lookup (reverse IP Lookup)
    The DNS reverse lookup converts an Internet IP address to host name (useful to identify the domain name of a spammer sending you spam email).
  • General Proxy Lookup
    The proxy lookup detects whether you are using a proxy server and shows the proxy host/type information and your actual IP address ("forwarded for" IP), if available. For a comprehensive proxy check, use the proxy checking function.
  • Geographic IP Location (IP to Country)
    The geographic IP location discovers the origin country of an IP address.
  • RBL (Realtime Block List) Lookup
    The blocklist lookup allows you to find whether an IP address is listed in the following public blocking lists - SpamCop, SBL, XBL, CBL, NJABL and SORBS.

What is an IP address?
Every computer connected to the Internet has a unique identifier called an IP address. On many networks, the IP address of a computer is always the same. On other networks, a random IP address is assigned each time a computer connects to the network.