About the Is It Down Right Now?
When a site won't open, the problem can be on your side (Wi-Fi, DNS cache, a blocked network) or on the site's side (DNS failure, server down, application errors, expired certificate).
Nuqti tests from outside your network in three layers — DNS answers from three providers, a TCP connection to the server, and loading the home page (retrying up to 3 times) — then tells you whether it's up, slow, blocked, erroring or down, and which layer failed.