Some domains ( 4,412,541 ) that recently used CloudFlare
In our zip files, if the direct-connect lookup failed, the domain is not
shown with an IP address and country, but is saved with its two CloudFlare
nameservers and rechecked the next time around. The current direct-connect
count is 2,267,969. Our data is cumulatively updated every three weeks.
Here is a 24.41MB zip file
of the domains with IP addresses that you can download and unzip. By scanning
this file for specific IP addresses or netblocks, researchers sometimes
discover clues about who is hiding behind CloudFlare.
IP addresses may be current, or they may have been current as long ago as
August 2012. Enter a domain in the search box below to see our IP address
lookups. If the direct-connect fetch done by the search below is unsuccessful
or inconclusive, this means that further research is needed to discover
whether an IP address is still valid.
A second 33.62MB zip file
lists all domains in our database, sorted by paired nameservers. Researchers
use this to find additional domains on a single CloudFlare account, thereby
developing more clues. A specific pair of nameservers yields a maximum of a
few hundred domains from this list, making it possible to scan manually.
The largest file zip file (51.57MB)
shows SSL information on more than 4 million domains. Unless you are a
programmer with a persistent interest in CloudFlare, it's easier to get the
same information one domain at a time, by using the search box below.
Domains that stop using CloudFlare nameservers are purged from the zip
files within three weeks. Our filtering may also discard domains that
are more annoying than interesting. One customer has
75,613 domains on a
single account. These mostly dot-com domains all use "frank" and "kate" for
their two nameservers, and point to a template page hosted at Amazon Web
Services. After the first click on any template, Google AdSense links pop
up on the same page send in the clickbots! To put it mildly,
CloudFlare attracts a huge amount of junk. Sometimes we get tired of
processing it, and take out loads of trash by using various programs we've
developed. But no matter what we do, most of it gets past our filtering.
We suspect that a higher power is opposing us.