What does the DNS check look for?
It checks that your domain's DNS is healthy and resilient. Specifically:
- Correct resolution — the domain resolves to the right server address without errors.
- Nameserver redundancy — multiple nameservers (ideally diverse) so one failure doesn't break resolution.
- Configuration health — no misconfigurations that could cause intermittent or partial resolution failures.
Correct resolution with redundant nameservers passes; resolution working but with limited redundancy is a warning; resolution errors or a single point of failure is a fail.
How is it evaluated, and how is it scored?
GEObubbly checks how your domain resolves and whether your nameserver setup is redundant. It's an extended Infrastructure check that runs server-side, querying the DNS for the domain.
Criteria: Pass — ≥2 NS and AAAA present. Warning — single NS or no IPv6. Fail — doesn't resolve or single fragile path.
Why DNS resolution and redundancy matter for SEO and GEO
Before anything else happens — before a single byte of your page loads — a visitor's device has to resolve your domain name into a server IP address through DNS. It's the very first step of every visit, and if it fails, the user simply can't reach you; the browser can't even attempt to connect. That makes DNS a critical, often-overlooked dependency. Two things matter. Correct resolution: the domain must resolve to the right address without errors or misconfiguration. Redundancy: your DNS should be served by multiple, ideally diverse, nameservers, so that one nameserver (or one DNS provider) going down doesn't take resolution — and therefore your entire site — offline. High-profile outages have shown that when a major DNS provider fails, every site relying solely on it disappears at once. Because DNS failures hit users and crawlers identically, an outage means lost traffic, missed crawls and, if prolonged, ranking impact.