dns-integrity · severity low
Nameserver resilience
Share of domains whose authoritative nameservers are all on a single provider.
Measured every Tuesday · last updated
How it is measured
Tier 0. NS lookup, map each host to a provider, count distinct providers. Denominator: any.
Why it matters
Single-provider DNS is a single point of total failure — when that provider has an outage the domain disappears entirely (web, mail, everything). Redundancy here looks present ("we have four nameservers") while all four share one fate.
Limits of this measurement
Low severity; single-provider is a reasonable choice for a small company, so this is context on concentration risk rather than a defect.
The base rate
Two independent populations. The global, domain-anchored figure is unbiased; the company-anchored figures are built by matching company names to domains and skew toward more digitally-mature firms. Both are published, so the gap is visible.
By company size band
Company-anchored cuts (national registries with a size proxy), split by size band. Right-hand figure is the share not meeting the control.
Every segment
Pick one to see the citable answer for a company like yours, with its trend and methodology.
Show the remaining 62 segments
Slices below 100 measured members are withheld rather than shown with a wide interval — an absent country or issuer means too little data, not zero failures. Licensed CC BY 4.0. Machine-readable data per segment: append .json or .csv to its URL.