Which IP should I whitelist?

Dear Sucuri Team,

Recently, I have blacklisted quite many IPs in Cloudflare and Wordfence, which were scanning my sites for suspicious php files.

Apparently, by doing this, I have also unwillingly blocked Sucuri, because now I get the “Unable to Properly Scan Your Site” error.

In the FAQ you wrote:

If you get an “Unable to Properly Scan Your Site” error, it’s likely because the WordFence plugin is blocking our scanner as an invalid crawler. You would have to white list our IP address on the WordFence dashboard.

But how can I find out which IP belongs to Sucuri?

Cheers,
Tom