WhiteList IP addresses and domains for CheckTLS

Add the following IP addresses and domain names to any network filters and/or domain Whitelists at your site.

IP Addresses:

mail11-do.checktls.com.
134.209.47.28
mail12-do.checktls.com.
104.131.118.193
mailbox1-do.checktls.com.
104.131.168.30
ts11-do.checktls.com.
165.227.190.238
tsa11-do.checktls.com.
134.209.169.224
www11-do.checktls.com.
167.71.160.115
www12-azure.checktls.com.
40.76.159.115
www12-do.checktls.com.
142.93.73.156
www6.checktls.com.
159.89.187.50
mail11-do.checktls.com.
2604:a880:800:c1::277:e001
mail12-do.checktls.com.
2604:a880:800:14::13e:a000
mailbox1-do.checktls.com.
2604:a880:800:14::177:c000
ts11-do.checktls.com.
2604:a880:800:a1::e95:1001
tsa11-do.checktls.com.
2604:a880:800:c1::2f1:5001
www11-do.checktls.com.
2604:a880:800:c1::1ca:9001
2001:470:1f10:1d7::2
www12-azure.checktls.com.
2603:1030:20e:3::136
www12-do.checktls.com.
2604:a880:800:c1::5d:a001
2001:470:1f10:1cc::2
www6.checktls.com.
2604:a880:800:a1::2b2:f001
2001:470:1f10:1b2::2

Domain Names:

CheckTLS.com
*.CheckTLS.com

Adding our IP address range to any network filters makes sure our tests are able to do the testing you request from our site.Our tests are non-invasive, non-intrusive, and non-obtrusive. They require no changes to your or any other system. They cause no extra processing and should not trip any security alarms.

Adding our domain to any Whitelists also makes sure our tests can do the testing you request, and it also makes sure any results we email to you get through to you and don't end up in a junk folder or thrown away.