Hacked this together to determine which ones out of the list are potentially using cloudflare reverse proxies. You could also send an HTTP request to them and look for the cloudflare-nginx Server header.
Could you tell us a little more about your idea? Nothing too specific obviously but at least what industry your idea is for and a little more background would be nice. I'm based out of Austin and have tons of friends in both Austin and Houston that have worked on a lot of really awesome projects in the past. Maybe I could help, but would like some more information :)
This is a WordPress specific problem... Not really that big of a deal. Sure it could be useful for a bad actor to use this method to define a username to initiate brute force attacks against..but it's a WordPress problem -- not specific to just Wired.
https://gist.github.com/dustyfresh/4d8d364ca4c6da465cfc7d817...