Guides
The concepts behind IP checks, with the evidence and a way to verify each one yourself.
What is an IP purity score? How to read it, and why checkers disagree
An IP purity or fraud score is not a standard — each checker adds up risk flags, IP type and blocklists its own way. What the score is made of, why the same IP scores differently, and which parts actually matter.
2026-09-30
Residential vs datacenter vs ISP IPs: what the difference is and how to check yourself
Why IP checkers disagree on whether an IP is residential, and three things you can check yourself: reverse DNS naming, registry (whois / RDAP) data and the network type.
2026-09-30
Which IP do ChatGPT and Claude actually see? Why a clean US IP still gets blocked
Proxy apps route by domain, so the IP a checker sees may not be the one ChatGPT or Claude sees. How to read the exact IP each AI site sees, in the browser and in the terminal.
2026-09-30