Understand the basics
Plain-English explainers on IPs, DNS, ASN, CGNAT, VPNs, WiFi, and networking - no jargon assumed.
Every article is paired with a live tool so the theory turns into real diagnostics immediately. Troubleshooting a VPN? Read the leak guide first, then run DNS and WebRTC checks. Investigating an unfamiliar IP? Pair the ASN and WHOIS articles with the lookup tools. Start with a concept, finish with a verified result.
Plain-English explainers on IPs, DNS, ASN, CGNAT, VPNs, WiFi, and networking - no jargon assumed.
Each article links to the diagnostic tool that proves the point, so you move from reading to real data in one session.
Troubleshooting guides walk through port forwarding, CGNAT, wrong IP location, VPN leaks, and more with step-by-step checks.
Understand how reverse DNS maps IPs to hostnames, where rDNS helps, and why its results are context rather than proof.
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Learn what an ASN is, how BGP uses autonomous system numbers, and how ASN differs from ISP, WHOIS, and reverse DNS data in an IP lookup.
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DNSBLs (DNS blacklists) help mail servers stop spam. Learn how they work and why they matter.
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