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.
AI VPN detection combines IP reputation, ASN, TLS fingerprints, behavior, and location mismatch to catch VPNs old blocklists miss.
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Published IP ranges and ASN patterns for OpenAI, Anthropic, Perplexity, Common Crawl, Meta, and Apple. How to verify AI bots with forward-confirmed reverse DNS.
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Block AI crawlers with robots.txt, user-agent rules at Nginx and Cloudflare, and ASN-level rate limiting. Verify the block with reverse DNS.
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Learn how to compare "what is my IP" tools and when you need DNS leak, WebRTC leak, ASN, and blacklist diagnostics beyond a basic IP checker.
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Learn how to identify your ISP from an IP address, interpret ASN data, and verify provider ownership with practical checks.
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Learn why IP geolocation can look wrong, how to verify ISP/ASN context, and practical ways to troubleshoot mismatched location results.
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Learn what an ASN in networking means, how BGP routing uses autonomous system numbers, and why ASN/ISP shows up in IP tracking tools.
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