Knowledge Base

Comprehensive documentation for all DNS, Email Security, and Network tools. Understand how each protocol works and how to interpret results.

Addons

🔐

DNSSEC Validator

Verify the cryptographic signatures of DNS records to ensure they haven't been tampered with or intercepted.

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🎭

HTTP Header Comparer

Differentially analyze the raw HTTP response headers of two different URLs to pinpoint configuration drift.

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🕸️

Subdomain Enumerator

Recursively discover hidden or forgotten subdomains associated with a root infrastructure via OSINT databanks.

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🏴‍☠️

Subdomain Takeover Scanner

Detect "dangling" DNS records that point to discontinued third-party cloud services vulnerable to hostile claim.

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🛠️

Tech Stack Profiler

Non-intrusively analyze a website to reveal the underlying frameworks, CMS, analytics, and server technologies powering it.

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📜

Certificate Transparency Log Search

Search the public Certificate Transparency logs to find every SSL/TLS certificate ever issued for a domain, revealing hidden subdomains.

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Blacklist

🏢

Email Domain Blacklist

Check if a specific email domain string is explicitly listed on industry blacklists.

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🚫

IP Blacklist Check

Checks if an IP address is listed on major RBLs (Real-time Blackhole Lists).

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🚪

SMTP Open Relay Test

Verify that a mail server securely blocks unauthorized third parties from bouncing mail through it.

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✉️

SMTP Transaction Test

Execute a full, simulated mail delivery transaction to diagnose MTA handshake errors.

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🐷

SpamAssassin Score

Run an email body and header block through the Apache SpamAssassin engine to calculate its spam probability.

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DNS

📍

A Record Lookup

The Address (A) record is the most fundamental DNS record type, used to map a domain name to an IPv4 address.

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🌐

AAAA Record Lookup

Maps a domain name to an IPv6 address.

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🛡️

CAA Record Lookup

Certification Authority Authorization (CAA) specifies which Certificate Authorities (CAs) are allowed to issue SSL certificates for a domain.

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🔗

CNAME Record Lookup

A Canonical Name (CNAME) record maps one domain name (an alias) to another (the canonical name).

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📧

MX Record Lookup

Mail Exchanger (MX) records specify the mail servers responsible for receiving email on behalf of a domain.

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🗺️

NS Record Lookup

Name Server (NS) records dictate which DNS servers are authoritative for a domain.

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🔄

PTR Record Lookup

Pointer (PTR) records map an IP address to a domain name, used precisely for Reverse DNS lookups.

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📜

SOA Record Lookup

The Start of Authority (SOA) record stores essential administrative information about a DNS zone.

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🚥

SRV Record Lookup

Service (SRV) records specify the hostname and port number for specific internet services.

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📝

TXT Record Lookup

Text (TXT) records hold arbitrary, machine-readable text data used for various verification and security functions.

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📡

DNS Propagation Checker

Polls multiple DNS servers worldwide to see how a DNS change is spreading across the globe.

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🔄

Reverse DNS Lookup

Resolves an IP address back to its associated domain name using PTR records.

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🗂️

DNS Zone Transfer Test (AXFR)

Attempts an AXFR request against every authoritative nameserver for a domain to check whether it hands the full zone to any anonymous client.

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Domain

🕰️

Domain Age Checker

Determine the exact age of a domain name since its original registration date.

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✅

Domain Availability Checker

Instantly check if a specific domain name is available for registration across multiple Top-Level Domains (TLDs).

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⏳

Domain Expiry Checker

Track the exact expiration date of any registered domain name.

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🗄️

Nameserver (NS) Extractor

Quickly extract the authoritative name servers designated for a specific domain name.

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🏢

Registrar Lookup

Identify the specific company or technical registrar where a domain is currently registered.

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🔍

WHOIS Lookup

A protocol used to query databases that store the registered users or assignees of an internet resource.

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Email Security

⛓️

ARC Record Checker

Authenticated Received Chain (ARC) preserves email authentication results across forwarding services.

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🖼️

BIMI Checker

Brand Indicators for Message Identification (BIMI) allows you to display a corporate logo next to your messages in the inbox.

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🔑

DKIM Checker

DomainKeys Identified Mail (DKIM) adds a digital signature to emails, allowing the receiver to verify that the email was indeed authorized by the owner of that domain.

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🛡️

DMARC Checker

Domain-based Message Authentication, Reporting, and Conformance (DMARC) is an email authentication protocol.

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🔗

DMARC Alignment Tester

Verify if the "Header From" address properly aligns with the SPF and DKIM authenticated domains.

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🔬

DMARC Record Analyzer

Deeply inspect and parse the syntax of a DMARC record to uncover logic flaws or unsupported tags.

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📊

XML Report Analyzer

Upload and parse technical XML-based DMARC Aggregate (RUA) reports into readable charts and lists.

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🔒

MTA-STS Checker

Mail Transfer Agent Strict Transport Security ensures emails are always delivered over encrypted TLS connections.

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📧

SPF Checker

Sender Policy Framework (SPF) is an email authentication method used to prevent spammers from sending messages on behalf of your domain.

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🔧

SPF Validator & Flattener

Deep analysis of SPF limits, resolving nested includes, and detecting the dreaded "10 lookup limit" violation.

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📈

TLS Reporting (TLS-RPT)

SMTP TLS Reporting mechanism to receive daily logs of email encryption failures.

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IP & Network

🏢

ASN Lookup

Retrieve Autonomous System Number details, identifying the ISP or organization that controls a given network route.

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🌍

IP Geolocation

Pinpoint the geographical location, ISP, and connection details of any public IP address worldwide.

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🚪

Open Port Checker

Test a specific TCP or UDP port on a server to verify if it is open, closed, or silently filtered by a firewall.

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📡

Advanced Port Scanner

Scan an IP address for common open ports simultaneously to discover active services and potential vulnerabilities.

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🏘️

Reverse IP Lookup

Discover all the domain names and websites that are hosted on a single, shared IP address.

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🧮

CIDR Subnet Calculator

Calculate network ranges, broadcast addresses, and total usable hosts from an IP address and CIDR prefix.

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🛤️

Visual Traceroute

Map the exact physical and logical routing path packets take from our servers to your target destination.

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🧾

IP WHOIS Lookup

Look up the administrative and technical ownership details for a given IP address or IP block.

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Reputation

⚠️

Domain Risk Assessment

Calculate a holistic threat score based on domain age, typosquatting vectors, and hosting history.

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🗑️

Email Content Spam Check

Analyze the internal payload of an email for malicious macro attachments or deceptive HTML formatting.

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🤝

HELO/EHLO String Validation

Ensures the server identifies itself using a Fully Qualified Domain Name (FQDN) that resolves accurately.

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🎯

Inbox Placement Prediction

Simulate how major mailbox providers classify your domain's emails globally.

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🦠

Malware Host Analyzer

Check if a domain or IP is actively distributing remote access trojans (RATs), ransomware, or botnet payloads.

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🎣

Phishing URL Detector

Identify domains explicitly crafted to deceive users into surrendering credentials (typosquatting, homoglyphs).

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🛡️

Google Safe Browsing Check

Query the official Google Safe Browsing API to see if a URL triggers a massive red warning screen in Chrome.

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🔌

SMTP Blackhole Diagnostics

Diagnose severe connection timeouts indicating your server has been network-level blackholed by an ISP.

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Web Security

🔀

Broken Redirect Finder

Detect invalid or looping HTTP redirects that damage SEO rankings and cause user frustration.

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📄

Canonical URL Check

Verify that a webpage properly defines its canonical, authoritative URL source to prevent duplicated content indexing.

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🔒

HTTPS Enforcement Test

Check if a webpage securely forces all insecure HTTP traffic to upgrade immediately to encrypted HTTPS.

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🌐

IPv6 Website Test

Verify that a website is fully reachable and functional over modern next-generation IPv6 networks without falling back to IPv4.

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🤖

Robots.txt Analyzer

Parse and validate a website's robots.txt file to ensure critical paths aren't accidentally blocked from search engines.

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🛡️

Security Headers Check

Inspect the raw HTTP response headers of a web server to ensure modern client-side browser protections are enabled.

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🗺️

Sitemap Extractor

Locate, download, and parse a website's XML sitemap to discover all internally mapped and indexed pages.

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🔒

SSL/TLS Checker

Validate the active SSL certificate chain, identifying expiry dates, issuing authorities, and trusted root status.

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🛡️

TLS Protocol Analyzer

Evaluate a web server to determine whether it supports modern encryption (TLS 1.2/1.3) or remains vulnerable via legacy SSL.

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🚨

HTTP Status Code Checker

A comprehensive diagnostic tool that identifies and classifies HTTP status codes and headers to uncover security misconfigurations.

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🔓

CORS Misconfiguration Checker

Sends cross-origin requests with varied Origin headers to detect dangerous CORS policies that let attacker sites read authenticated responses.

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🧰

HTTP Methods Enumeration

Probes a server to discover which HTTP verbs it accepts, flagging dangerous methods such as TRACE, PUT, DELETE and WebDAV verbs.

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