DNS Check
Audit the authoritative name servers of a domain: consistency, SOA, glue, open recursion and response times.
About the DNS Check
DNS Check audits the name-server infrastructure of a domain the way a registry technical review would: it compares the delegation at the parent zone with the NS set the zone itself publishes, verifies that each name server answers authoritatively, checks SOA serial agreement across servers, response times, IPv4/IPv6 and network diversity, open-recursion exposure, glue records and SOA timer sanity, and summarises DNSSEC status.
Lame delegations, mismatched NS sets and single-network name servers are the most common causes of intermittent resolution failures — the kind of problem that shows up as “the site works for me but not for the customer”.
Monitor this automatically
Get alerted when this check starts failing, when you land on a blacklist or when a certificate or domain is about to expire.
Start free monitoring