IP blacklists lookup


Only IPv4 addresses are supported

How IP blacklists lookup works?

IP addressWiki

The blacklist check will show if the entered IP address is listed with DNSBL systems. These systems are used by email system administrators to try and eliminate spam email messages before they reach their users. DNSBL is a Domain Name Blacklist. There are dozens of DNSBLs online, all of which use a wide variety of criteria for listing and delisting addresses. Spam filters utilize various DNSBLs to verify that the incoming emails do not originate from blacklisted sites. DNSBLs are generally the first line of defense against spam. 

What is IP address

IP addressWiki

Internet Protocol Address (or IP Address) is an unique address that computing devices such as personal computers, tablets, and smartphones use to identify itself and communicate with other devices in the IP network. Any device connected to the IP network must have an unique IP address within the network. An IP address is analogous to a street address or telephone number in that it is used to uniquely identify an entity. Even more informations about IP addresses you can find in this Wikipedia article