Is Google DNS down?
Reading loads from the board.
Google answers on 8.8.8.8 and 8.8.4.4 (general purpose, no filtering). isitdns reads it from one seat, over DoT, every 3 min.
// addresses
- IPv4
8.8.8.88.8.4.4- IPv6
2001:4860:4860::88882001:4860:4860::8844- Hostname
dns.google- DoH
https://dns.google/dns-query- Kind
- public recursive resolver, probed (general purpose, no filtering)
// how isitdns reads it
The resolver board measures one rung continuously: does the resolver answer over DoT, how fast, and did it set the DNSSEC ad flag.
A strike opens after two degraded rounds in a row, unless the newest reading inside 4 minutes from a seat on a different network says that resolver is healthy.
We never claim to see the whole internet. We see what we watch, from where we watch it, and right now that is one seat.
// ask DNS itself
The same reading answers over DNS. One TXT record per resolver, written into
the isitdns.net zone every 3 minutes:
$ dig +short google.isitdns.net TXT
It answers with the resolver id, its state, latency, whether it validated
DNSSEC, and when the sample was taken. For the whole board in one line, ask
dig +short help.isitdns.net TXT.
// the operator's own pages
Run by the operator. Not mirrored here.