If you suspect your IP address is being blocked by someone using Trend Micro's Network Reputation Services, please enter the full IP address.

Please note: this Lookup Tool is based on IP addresses; it does not use host or domain names. For example: 127.0.0.1

WARNING: Trend Micro's customers can also block IPs by themselves. In this case the IPs will not be found in our list. Please contact the receiving email administrator directly.