# Course 35 - Footprinting and Reconnaissance | Episode 2: Gathering Intelligence with NSlookup and WHOIS

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Text version: https://stenobird.com/podcast/cybercode-academy-7578615/course-35-footprinting-and-reconnaissance-episode-2-gathering-intelligence-with-nslookup-and-whois.md
Podcast: [CyberCode Academy](https://stenobird.com/podcast/cybercode-academy-7578615)
Published: 2026-05-23T06:00:06+00:00
Episode link: https://www.spreaker.com/episode/course-35-footprinting-and-reconnaissance-episode-2-gathering-intelligence-with-nslookup-and-whois--72013124
Audio file: https://dts.podtrac.com/redirect.mp3/api.spreaker.com/download/episode/72013124/weaponizing_public_dns_and_whois_records.mp3
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Duration seconds: 1304

## Resource

In this lesson, you’ll learn about: network footprinting using NSlookup and WHOIS1. What is Network Footprinting? The process of gathering technical information about a target domain Focuses on: DNS data IP addresses Domain ownership 👉 Goal: Build a clear profile of the target’s infrastructure 2. Using NSlookup (DNS Intelligence)🔹 Tool Overview NSlookup A command-line tool used to query: DNS (Domain Name System) records 🔹 What You Can Discover Domain → IP address mapping DNS servers Network-related details 🔹 Interactive Mode Allows advanced queries like: MX Records (Mail Servers) Identify email infrastructure 👉 Why it matters: Reveals: Email servers Attack surface for phishing or targeting 3. Using WHOIS (Administrative Intelligence)🔹 Tool Overview WHOIS Often accessed via: ICANN 🔹 What You Can Discover Domain registrar Registration & expiration dates Name servers Contact details: Emails Phone numbers Addresses 4. Key Data ExtractedData TypeSourceValueIP AddressNSlookupNetwork targetingMX RecordsNSlookupEmail infrastructureRegistrar InfoWHOISDomain ownershipContact DetailsWHOISSocial engineeringName ServersBothInfrastructure mapping5. Strategic Importance This data helps build: A complete footprint of the target 🔹 Potential Use Cases (High-Level) Identifying: Entry points Services to investigate Supporting: Security assessments Risk analysis 6. Role in Footprinting Phase Part of: Early-stage reconnaissance 👉 It enables you to: Move from: Domain name → full infrastructure visibility Key Takeaways NSlookup is used for DNS-level intelligence WHOIS provides administrative and ownership data MX records reveal email systems Public data can expose critical infrastructure details Footprinting is the foundation of any security assessment Big PictureThis stage is about:👉 Tur…

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