Within the last week or so, without any network changes on our end, 184.108.40.206 is no longer pinging (100% packet loss), and it appears that it’s not working for DNS lookups anymore. 220.127.116.11 works.
We have Frontier FiOS, and Cisco Meraki. Note that we’ve had this exact setup for about 3 years now, and have been using 18.104.22.168 since the week it came out, so I’m flummoxed as to why 22.214.171.124 is no longer working.
Note that when I VPN outside, or SSH into one of our external servers, pinging 126.96.36.199 works just fine.