Health

How the resolver is actually performing. Latency figures exclude cache hits; those resolve in microseconds and would flatter every number equally.

Median lookup: 0.0ms
Slow tail: 0ms
Cache hit: 0.0%
Failures: 0.00%

Where the time goes

Distribution of uncached lookup times. A healthy resolver is a wall on the left with a thin tail; a fat middle means something is consistently slow.

Resolvers

Spread is p95 ÷ p50: how much worse a bad lookup is than a typical one. A high spread is the signature of an upstream that is usually fine and occasionally awful, which is what makes pages hang for no visible reason.

Resolver	Queries	p50	p95	Spread
dns10.quad9.net	4,050	45.4	55	1.2×
dns.cloudflare.com	3,123	18.2	22	1.2×
one.one.one.one	1,695	21.4	26	1.2×

Validation and transport

DNSSEC validated: 0 answers carried a validated signature
Encrypted transport: Every client is talking to this resolver in plain DNS over the LAN.
NXDOMAIN: 172 names did not exist
Empty answers: Resolved without returning an address, often an AAAA lookup on an IPv4-only host

Slowest domains

Averaged over uncached lookups, minimum five queries. Usually an upstream problem wearing a domain’s name.