Well, typically 1.1.1.1 responds to pings. So it not responding is an indication that it's no longer working.

captainkrtek 15 hours ago | parent | next [-]

Or that it started filtering ICMP. If DNS works then it’s doing its job

	▲	Macha 3 hours ago \| parent [-]
		Though the reason everyone started pinging is because DNS wasn't working

▲

gerdesj 15 hours ago | parent | prev [-]

... or a change of policy, funky firewall or whatever.

It does seem to be responding to ping again and since my edit above, the first packet is being responded to so I suspect a NOC is having a fun old time somewhere.

You do need to test the service properly. I do this malarky for a living 8) I'm ever so popular with kiddies and their gaming related fixation with ping times ...