SOA Record Lookup
Look up a zone's start-of-authority settings.
Free, no account needed.
About SOA records
The SOA record describes a DNS zone: its primary nameserver, the administrator's contact (with the @ written as a dot), a serial number that changes with every edit, and timers for refresh, retry, expiry and negative caching.
If secondary nameservers show different serial numbers, they aren't in sync and some visitors may see old records.
Frequently asked questions
What is the SOA minimum TTL?
How long resolvers cache "this record doesn't exist" answers. A high value can delay new records from appearing.
Related tools
- Dig: Online DNS LookupQuery any DNS record type the way the dig command does, from Google Public DNS or Cloudflare, with TTLs, the response status and DNSSEC validation.
- A Record LookupLook up the IPv4 addresses a hostname points to.
- AAAA Record LookupLook up the IPv6 addresses a hostname points to.
- CNAME LookupLook up the canonical name an alias points to.
- TXT Record LookupLook up the text records published for a name.