Guides & Use Cases
Short practical guides that connect the tools on this site to real troubleshooting scenarios.
Complete Domain Health
Enter a domain and get a combined view of DNS, DNSSEC, CAA, HTTPS/TLS, security headers, MX, SPF and DMARC. Every result links to the dedicated checker.
Open tool → EMAIL-SECURITYEmail Security Analyzer
Inspect MX, SPF, DMARC, DKIM with a selector, MTA-STS, TLS-RPT and BIMI. Results separate required, optional and attention items.
Open tool → DNS-PROPAGATIONDNS Propagation Check
Compare the same record across Google, Cloudflare, Quad9, OpenDNS, AdGuard and authoritative DNS to spot cache or inconsistent changes.
Open tool → DNS-CHECKERDNS and propagation checks
Choose a record, compare public resolvers and see whether answers match authoritative DNS. This is especially useful after A, MX, TXT or CNAME changes.
Open tool → DNSDNS or mail issue
Check A/AAAA for addressing, MX for mail flow, TXT for SPF/verification and NS to identify DNS hosting.
Open tool → SSLWebsite certificate warning
Run SSL Check and inspect subject, issuer, SAN, expiry date and remaining days.
Open tool → PORTService is unreachable
Check the single TCP port used by the service. If closed, continue with firewall, NAT and service checks.
Open tool → TRACEROUTELatency or disconnects
Start with ping for latency, then traceroute to inspect the path and where anomalies begin.
Open tool → HEADERSWebsite behind a proxy/CDN
HTTP Headers helps identify server headers, redirects, caching and security headers.
Open tool → SUBNETPlan a subnet change
Enter CIDR and get network, broadcast, netmask, usable range and address count.
Open tool →