How many nameservers should a domain have?

DNS health report

Are your nameservers all answering, in sync and spread out enough to survive an outage?

Live lookupPlain English + technicalFree, no sign-up

The health check runs this and 30 more checks on a domain, then ranks what to fix.

Test every authoritative nameserver for a domain: does it answer, do SOA serials match, is it lame or slow, and are they on separate networks.

Every result comes in two styles: plain English for everyone, and the exact technical detail for engineers, with the raw JSON one click away.

At least two, ideally on different networks, so one outage doesn’t take you offline.