The GPF DNS Block List

The GPF DNS Block List

The 25 Worst Class C Networks

The following Class C networks (i.e. IP address ranges where the first three octets are the same) are considered on our "worst offender list" because multiple IPs within their range have been logged attacking our servers. Note that this is only the top 25 Class C networks; there are likely many more with multiple IPs in the database, but these are the networks with the most individual IPs listed. This count/list includes both active and expired records, which provides a historically poor reputation for the network's owner. Networks with a high number of individual attacking IPs are more likely to be banned completely, even if there are IPs in their range that have not attacked us yet.

Note that Class C network data only applies to IPv4 addresses. We currently do not store network data for IPv6 addresses.

Class CNumber of Offending IPsPercentage
40.77.167.*10943%
51.255.65.*9437%
31.184.238.*8835%
91.200.12.*8835%
115.84.91.*8835%
188.143.232.*8533%
202.137.155.*8031%
115.84.92.*8031%
202.137.154.*7630%
91.236.74.*7329%
193.105.210.*6325%
193.201.224.*5622%
199.15.234.*5421%
23.129.64.*5220%
192.119.144.*4718%
31.171.134.*4618%
91.201.66.*4618%
164.132.161.*4518%
198.143.144.*4518%
91.236.75.*4216%
198.143.143.*4216%
170.0.126.*4016%
142.91.81.*4016%
199.15.233.*3715%
117.169.1.*3614%

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