IPBlackList is a tool for
checking if an IP address is listed in various black lists, such as
SPAM databases, banned IP addresses, open proxies or mail relays,
etc. This tool is instrumental in figuring out why a given IP
address is rejected by some network resources, such as mail
IPBlackList checks the entered
IP address against the databases maintained by numerous DNSBL
servers (click here for more information on
this technology). In brief, this tool works as follows: For
instance, you want to check if 22.214.171.124 is on the black list
maintained by the antispam.somedomain.com
server. IPBlackList sends a DNS
query that looks like 126.96.36.199.antispam.somedomain.com
to the default DNS server. If
such a DNS record exists, i.e. the specified host address is
resolvable to an IP address (according to the DNSBL specifications,
such IP address must belong to the range of local IP addresses,
i.e. 127.x.x.x.), then the IP address we're checking, 188.8.131.52, is
Please note that we do not
maintain any of these lists, and therefore we cannot remove you
from any of them.
IPBlackList allows you to check
an IP address against multiple DNSBL servers simultaneously.
Essential NetTools includes a list of popular DNSBL servers, but
you can use your own list by clicking on the DNSBL servers
An up-to-date list of
functioning DNSBL servers is available at http://www.declude.com/Articles.asp?ID=97 .
Right-clicking on the window
brings up a menu with the following commands:
– copies the IPBlackList table
to the clipboard.
||Save – saves the IPBlackList table to a