Mon, 20 Mar 2017 CheckTLS Whitelist
Add the following IP addresses and domain names to any network filters and/or domain Whitelists at your site.
IP Address Range: 18.104.22.168-115 (22.214.171.124/30 or 126.96.36.199/255.255.255.252)
Domain Names: CheckTLS.com and *.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.