{
 "metric": "ns-resilience",
 "segment": "eu",
 "anchor": "domain",
 "label": "the EU (domains)",
 "population": "domains in the EU",
 "states": [
  "multi_provider",
  "single_provider"
 ],
 "quiet_failure_states": [
  "single_provider"
 ],
 "measurement": "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": "Low severity; single-provider is a reasonable choice for a small company, so this is context on concentration risk rather than a defect.",
 "data_tier": "dns",
 "population_predicate": "any",
 "entity_type": "domain",
 "kind": "failure",
 "latest": {
  "day": "2026-08-11",
  "n": 224,
  "qf_pct": 91.96,
  "ci": [
   87.66,
   94.86
  ],
  "dist": {
   "multi_provider": 8.04,
   "single_provider": 91.96
  },
  "snapshot": "common-crawl-domain-stratified-c400-g2500-seed20260729"
 },
 "series": [
  {
   "day": "2026-08-01",
   "n": 92,
   "qf_pct": 96.74,
   "ci": [
    90.85,
    98.88
   ],
   "dist": {
    "multi_provider": 3.26,
    "single_provider": 96.74
   },
   "snapshot": "common-crawl-domain-stratified-c150-g2500-seed20260729"
  },
  {
   "day": "2026-08-05",
   "n": 224,
   "qf_pct": 91.96,
   "ci": [
    87.66,
    94.86
   ],
   "dist": {
    "multi_provider": 8.04,
    "single_provider": 91.96
   },
   "snapshot": "common-crawl-domain-stratified-c400-g2500-seed20260729"
  },
  {
   "day": "2026-08-11",
   "n": 224,
   "qf_pct": 91.96,
   "ci": [
    87.66,
    94.86
   ],
   "dist": {
    "multi_provider": 8.04,
    "single_provider": 91.96
   },
   "snapshot": "common-crawl-domain-stratified-c400-g2500-seed20260729"
  }
 ],
 "license": "CC BY 4.0",
 "source": "https://quietfailures.com/datasets/ns-resilience/eu"
}