IP Address Geolocation

DNS Record Lookup

MX Record Lookup

DMARC Record Lookup

SPF Record Lookup

DKIM Record Lookup

IP Leak Test

This test reveals your current public IP address to check for potential leaks.

Security Checks

Internet Speed Test

Measures ping, download (up to 5 MB), and upload (10 KB–50 KB) with fallbacks.

Know Your Lookup – Complete Guide

This all‑in‑one network diagnostic suite gives you everything from IP geolocation to email authentication checks and a full speed test. Below is a detailed breakdown of every tool, what it does, and how to get the most out of it.

🌐 IP Lookup

What it does: Finds the geographical location and Internet Service Provider (ISP) of any IPv4 address, or your own public IP.

How to use: Enter an IP (e.g., 8.8.8.8) and click Lookup IP, or click Find My IP to auto‑detect your own address.

Data shown:

• IP Address – the queried address.
• Country – two‑letter country code.
• City – city name (if available).
• Region – state/region.
• ISP – the organisation providing the IP.
• Registrar – often the same as ISP.
• Timezone – the time zone of the location.

🔍 DNS Lookup

What it does: Queries any domain for its DNS records. You can choose a specific record type or fetch all common types (A, AAAA, TXT, NS, CNAME).

How to use: Enter a domain (e.g., google.com), select the record type from the dropdown, and click Lookup.

Record types explained:

• A – IPv4 address of the domain.
• AAAA – IPv6 address.
• MX – Mail Exchange servers (priority and hostname).
• TXT – Text records (used for SPF, DKIM, DMARC, verification).
• NS – Name Servers for the domain.
• CNAME – Canonical name (alias) pointing to another domain.
• SOA – Start of Authority (administrative info).
• CAA – Certification Authority Authorization (which CAs can issue certificates).
• SRV – Service records (hostname and port for specific services).
• PTR – Pointer record (reverse DNS – maps IP to domain).

Additional features:

• DNSSEC validation – if the domain uses DNSSEC, a green 🔒 DNSSEC validated badge appears.
• Propagation checker – click 🌐 Check Propagation to compare results from Cloudflare, Google, and Quad9 public resolvers – useful to see if a DNS change has spread.

📧 MX Lookup

What it does: Specifically retrieves Mail Exchange (MX) records for a domain and resolves each mail server hostname to its IP addresses (both IPv4 and IPv6).

How to use: Enter a domain and click Lookup MX.

Data shown: A table with Preference (lower = higher priority), Hostname of the mail server, IP Addresses (all resolved A/AAAA records), and TTL.

Use case: Troubleshooting email delivery, verifying that your MX records are correctly set up.

🛡️ DMARC Suite

What it does: Two tools in one: Lookup (check existing DMARC record) and Generator (build a valid DMARC policy).

Lookup: Enter a domain and click Lookup DMARC. It searches for a TXT record starting with v=DMARC1 and displays it.

Generator: Fill in the fields:

• Policy (p) – none (monitor), quarantine (mark as spam), or reject (block).
• Subdomain Policy (sp) – policy for subdomains (optional).
• Percentage (pct) – percentage of messages to apply the policy to (optional).
• Aggregate Reports (rua) – email address for aggregate reports.
• Forensic Reports (ruf) – email for forensic reports.
• DKIM Alignment (adkim) – r (relaxed) or s (strict).
• SPF Alignment (aspf) – r (relaxed) or s (strict).
• Failure Options (fo) – when to send forensic reports.
• Reporting Format (rf) – usually afrf.
• Reporting Interval (ri) – seconds between reports.

Click Generate DMARC Record to get a ready‑to‑use TXT entry that you can copy and add to your DNS.

📨 SPF Suite

What it does: Lookup and generate SPF (Sender Policy Framework) records – a TXT record that lists authorised sending IPs for your domain.

Lookup: Enter a domain and click Lookup SPF. It finds TXT records starting with v=spf1.

Generator: Build your SPF record using an interactive mechanism builder. Add as many mechanisms as needed:

• Qualifier – + (pass), - (fail), ~ (softfail), ? (neutral).
• Mechanism type – include, a, mx, ptr, ip4, ip6, exists, redirect, exp, or all.
• Value – domain, IP, etc. (required for most types).

Click Generate SPF Record to get the final TXT entry, which you can copy directly.

🔑 DKIM

What it does: Looks up DKIM (DomainKeys Identified Mail) public keys stored in DNS. DKIM helps verify that an email was genuinely sent by the claimed domain.

How to use: Enter a domain. Optionally provide a custom selector (e.g., mailer). If you leave it blank, the tool tries common selectors: google, s1, s2, k1, default, mail, selector1, 2020.

What you see: The raw TXT record containing the DKIM public key (starts with v=DKIM1;) and its TTL.

🕵️ IP Leak Test

What it does: Reveals your current public IP address and attempts a reverse DNS lookup to find the associated hostname. This is useful to verify if your VPN or proxy is effectively hiding your real IP.

How to use: Click Perform Leak Test. The tool will display your public IP, hostname (if a PTR record exists), country, city, and ISP.

🔒 Security Checks

This tab is split into three main security scanners:

IP Security Check

Enter an IP address and click Check IP Security. It runs three independent checks:

• VPN/Proxy/TOR detection – via ipinfo.io’s threat data.
• Spamhaus Zen blacklist – checks if the IP is listed on the Spamhaus Zen DNSBL.

The result is a table with each check’s status, and an overall “safe” or “warning” summary.

Domain Security Check

Enter a domain and click Check Domain Security. It performs:

• DNS record presence – checks if A/AAAA, MX, TXT, NS, and CNAME records exist.
• SSL/TLS certificate analysis – connects to SSL Labs’ API to retrieve the certificate grade, validity date, and issuer.

If the SSL analysis is in progress, the tool will retry up to 3 times (2‑second intervals). You can also manually retry using the ↻ Retry SSL button.

Domain Blacklist (SURBL)

Checks if a domain is listed in the SURBL (Spam URI Realtime Blocklists) – a list of domains that appear in spam messages.

How to use: Enter a domain and click Check Blacklist. The tool queries multi.surbl.org via DNS; if the domain is listed, you’ll see a warning.

⚡ Speed Test

What it does: Measures your internet connection’s ping, download, and upload speeds.

How it works:

• Ping – downloads a 1‑byte file from Cloudflare to measure latency.
• Download – tries three file sizes: 5 MB (primary), 1 MB, and a jQuery fallback (~30 KB) to ensure a result.
• Upload – sends a 10 KB payload (and if that fails, 50 KB) to one of three test endpoints (httpbin.org, postman-echo.com, ptsv2.com).

Results are shown in Mbps (megabits per second). A detailed log is displayed below the results, showing each step and any fallbacks used.

🧰 Additional Website‑Wide Features

These tools are available across all tabs:

• History (📜) – stores your last 20 lookups in your browser’s local storage. Click any history item to re‑run that lookup.
• Export – every result panel has JSON, CSV, and Copy All buttons to save or share data.
• Monitoring (🔄 Monitor) – on IP Lookup and DNS Lookup, you can start a 5‑second interval monitor that checks for changes and sends a browser notification if a change is detected.
• Dark Mode (🌙/☀️) – toggle the entire interface to a dark theme; your preference is saved.
• Developer Tools (⚙️) – each result panel includes a collapsible dev section showing cache status, response time, and the raw JSON response from the API – useful for debugging.
• Caching – all lookups are cached for 5 minutes to reduce API calls and speed up repeated queries.

This tool is built with privacy in mind – no data is sent to any server other than the public APIs used (Cloudflare DNS, ipinfo.io, SSL Labs, SURBL). All history and preferences are stored locally in your browser.

About Us

Hi, I'm a Systems Analyst with expertise in Salesforce & Microsoft 365. This DNS toolkit is built to simplify network diagnostics and email authentication setup.

📧 Contact: [email protected]