IPTool
Fast system administrator tools
Menu
Domain
Enter a domain name to retrieve its DNS records (A, AAAA, MX, NS, TXT, SOA, CNAME) and WHOIS data. A quick way to troubleshoot email delivery, verify DNS propagation or audit a domain's configuration.
What it is
A domain is a DNS name pointing to resources. NS, A/AAAA, MX and TXT records define routing and verifications.
How it works
Use the check tools to inspect NS, TTL, SOA and WHOIS to assess delegation, ownership and dates.
Examples
- NS check reveals which servers serve the domain.
- WHOIS shows registrar and creation/expiry dates.
Limitations & notes
WHOIS data may be redacted due to GDPR or privacy proxy. DNS changes can be cached (TTL).
FAQ
- What is TTL in DNS? TTL (Time To Live) is the number of seconds a DNS record can be cached by resolvers and browsers before they must query the authoritative nameserver again. A low TTL (e.g. 300) means changes propagate quickly but increase DNS traffic. A high TTL (e.g. 86400) reduces load but delays propagation of updates.
- Why do NS records show different results? DNS uses a hierarchical caching system. Different resolvers may have cached different versions of a record depending on when they last queried it. After changing nameservers, it can take up to 48 hours for all caches worldwide to expire and reflect the new delegation.
- What is the difference between A and CNAME records? An A record maps a domain directly to an IPv4 address (e.g. example.com -> 93.184.216.34). A CNAME is an alias that points one domain to another (e.g. www.example.com -> example.com). CNAMEs cannot coexist with other record types at the same name and add an extra DNS lookup step.
- How do I verify DNS propagation? After making DNS changes, check the records from multiple geographic locations. Our tool queries your domain's authoritative nameservers directly, showing the current state regardless of cache. For a global view, you can also use dig with specific resolvers:
dig @8.8.8.8 example.com A.