Blog
Honest writing on IP intelligence.
Working code, clear explainers, and straight talk about what IP signals can and can't do.
Using IP signals to slow account-takeover attacks
IP signals won't stop ATO on their own — but as one layer they raise the cost of attacks. Here's a pragmatic, honest pattern with working login code.
Read post →Residential vs datacenter proxies, explained
Datacenter proxies are easy to spot; residential proxies route through real consumer devices and are deliberately evasive. Here's how to think about both.
3 February 2026 · 6 minWhat is an ASN — and why it matters for IP fraud
The ASN behind an IP tells you whether it's a home ISP, a cloud host or a sketchy network. Here's the concept, how to look it up, and how to use it.
27 January 2026 · 8 minHandling VPN users at a React signup — step up, don't block
Blocking everyone on a VPN is a bad idea. Here's how to wire an IP risk check into a React signup and respond with friction proportional to risk.
20 January 2026 · 7 minHow to detect a VPN by IP address in Node.js
A copy-paste Express middleware that flags VPN/proxy/datacenter IPs and steps up verification — with an honest take on what the signal can and can't tell you.
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