Guide to dns.pizza
Start from the question you have. Each one lists the tool to try first, then the ones that go deeper. Want the plain list? All tools.
Is my mail landing?
Mail that lands in spam, or not at all, is nearly always a DNS record: SPF, DKIM, DMARC, MX, or a blocklist entry.
SPF Checker
Your SPF record, its verdict, and the 10-lookup budget, instantly.
DKIM Checker
Probe the common DKIM selectors and validate any keys found.
SPF Include Tree
Your SPF record gets ten DNS lookups. The tree shows where every one goes, and which vendor include spends the eleventh.
DMARC Checker
Policy, alignment, and whether it actually enforces anything.
MX Lookup
Mail servers, priorities, IPs, and reverse DNS in one pass.
Email Authentication
Validate SPF, DKIM, and DMARC with detailed recommendations.
Blacklist Checker
Check if a domain or IP is on major DNS blacklists.
Is my site safe?
Certificates that lapse, records that point at someone else's server, and a zone that gives away its own contents.
SSL Checker
Live TLS handshake: issuer, expiry countdown, protocol, SANs.
Hands
Which hostnames are still renewed by a person? Read from the public certificate log's renewal rhythm.
DNSSEC Validation
Full cryptographic chain of trust verification.
Zone Walk
NewA zone signed with plain NSEC names every record it has. Follow the chain and see the whole list.
Stranger IP
NewIs a stranger answering for your hostname? Finds DNS records still pointing at cloud IPs you released.
Threat Analysis
Detect DGA, DNS tunneling, fast-flux, and suspicious patterns.
Who owns this domain?
The registrar, the dates, the nameservers, and how long the name has been around.
Domain Report
NewComplete AI-generated intelligence report: DNS, WHOIS, SSL, security, email, and more.
Domain Age Checker
Registration date, exact age, expiry, registrar, and first archive capture — answered on the page.
Then vs Now
NewWhat a domain was when AboutUs recorded it (2006–2014) and what it is today: still the same organisation, or changed hands?
When does it drop?
A lapsed domain passes through grace, redemption and pending delete before anyone can register it again.
Recently shipped
Nothing shipped in the last seven days. These are the latest changes.
- Stranger IPNew tool
New: Stranger IP — Is a stranger answering for your hostname? Finds DNS records still pointing at cloud IPs you released.
Updated — Registration info: registrar, creation/expiry dates, nameservers, status.
- Drop DateNew tool
New: Drop Date — Expired, in redemption or pending delete? Where a domain sits in its dying, and the day it will be released.
- Zone WalkNew tool
New: Zone Walk — A zone signed with plain NSEC names every record it has. Follow the chain and see the whole list.
- SPF Include TreeNew tool
New: SPF Include Tree — Your SPF record gets ten DNS lookups. The tree shows where every one goes, and which vendor include spends the eleventh.
Everything else
Raw lookups, speed, and reference: for when you already know what you are looking for.
Compare Domains
NewSide-by-side comparison of two domains across every metric.
Domain Explorer
Explore the top 100,000 domains by popularity and activity.
DNS Lookup
Query A, AAAA, MX, NS, TXT, SOA, CAA, and other DNS record types.
Propagation Check
Verify DNS propagation across 22+ global resolvers.
SOA Checker
Do your nameservers agree? Every server's SOA serial side by side, the zone's edit diary, and its expire clock.
Quick DNS Lookup
All record types on one page with a shareable result link.
Global Speed Test
Measure DNS resolution speed from multiple regions worldwide.
Resolver Performance
Continuous monitoring of public resolver speed and reliability.
Compare Resolvers
Side-by-side comparison of Google, Cloudflare, Quad9, and more.
Lookup History
Review past lookups and compare changes over time.
Learn DNS
Reference articles on DNS concepts and best practices.