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IPv6 support
Methodology v7 · canonical ID ipv6-support · DNS Security · informational · census as of July 28, 2026
Reachable over the modern internet protocol.
Definition
| Canonical ID | ipv6-support |
|---|---|
| Category | DNS Security |
| Grade impact | Informational — never moves the grade |
| Pass | The domain publishes an AAAA record (IPv6 address). |
| Fail | No AAAA record is published. |
| Example (passing) | example.com. IN AAAA 2001:db8::1 |
No-data rule: when this check couldn't be determined for a domain (timeout, SERVFAIL, redacted
source) it returns N/A and is excluded from that domain's scoring denominator — "couldn't determine"
is never counted as a failure. "Determined absent" is a real fail.
Prevalence across the census
23.1% of graded domains publish an AAAA (IPv6) record (63,815,952 of 275,666,275, as of July 28, 2026).
AAAA-presence measured from raw DNS records, scaled to the deduped graded denominator.
Census denominator: 275,666,275 graded domains. Aggregates only — never an individual domain's result.
Fix it
Plain-English impact, cost of ignoring it, and step-by-step remediation: defaults.exposed/en/fix/ipv6
Cite this check
Defaults.Exposed, "IPv6 support (ipv6-support)", Grading Methodology v7 (census as of July 28, 2026). https://defaults.exposed/methodology/v7/ipv6-support
Permalink: https://defaults.exposed/methodology/v7/ipv6-support ·
All 34 checks: v7 registry ·
Machine-readable: checks.json ·
Licence: open data