In light of the recent CloudBleed discovery, I wanted to provide a list of Bitcoin exchanges that use Cloudflare. I cross-checked the top 15 Bitcoin exchanges from our own market data and the following exchanges [that I’m aware of] use Cloudflare:

bitfinex.com

btc-e.com

cex.io

coinbase.com

gdax.com

localbitcoins.com

kraken.com

What does this mean? If you hold an account on one of these exchanges, it’s best to change your password immediately. This may be precautionary, but it’s better safe than sorry. If you don’t have two factor auth (2FA) set up on your account, do it immediately (also on your email too). If you aren’t actively trading, it’s always best to keep your coins on your own personal wallet that you can backup.

How did I come up with this list? I downloaded and cross-checked this list and also checked whois name servers for each exchange to verify.