Build a heatmap from raw IP address logs
Turn a plain access log full of IP addresses into a set of mapped coordinates ready to plot as a heatmap, by resolving unique addresses in bulk.
Tag
#ip-lookup
Business versus residential IP classification, and its limits
Classifying an IP address as business or residential is a genuinely useful signal for many applications, but it is an inference from network characteristics, not a guaranteed fact.
Add server-side geolocation to a Node or PHP app
Call the IP lookup endpoint directly from your backend code, whether you are running Node or PHP, with no client script involved.
Why some IP ranges resolve only to a country, not a city
Some IP address blocks are allocated and used in a way that genuinely does not support city-level resolution, and returning a guess anyway would be worse than being honest about the limit.
Build a currency-aware pricing page from IP data
Show a visitor a price in a currency they recognize by detecting their country from IP, while keeping your own settlement currency fixed.
Anycast and CDN IP ranges: a special case for geolocation
An anycast IP address can be answered by any one of several physical servers around the world, which makes its geographic location fundamentally different from an ordinary IP address.
Build a simple IP reputation check for signups
Compare an IP address's location and network details against what a signup form claims, catching obvious mismatches without a dedicated fraud tool.
Show the right business hours based on visitor location
Display "open now" or "closed" correctly for a global audience by resolving the visitor's local time zone before comparing it against your posted hours.
Build a time zone picker that defaults to the visitor's zone
Pre-select a visitor's own time zone in a settings form using their IP address, instead of asking them to search for it themselves.
Add a "detect my location" button without the browser prompt
Skip the browser's location permission dialog by detecting an approximate location from the visitor's IP address entirely on your own server.
What ASN data can and can't tell you about a location
An autonomous system number tells you which network operator carries traffic for an IP address, which is a useful and often underused signal, but it is not the same as a location.
IPv6 allocation and what it means for geolocation
IPv6's vastly larger address space changes how blocks get allocated and used, with real consequences for how precisely an IPv6 address can be geolocated.
Add a country dropdown that defaults from IP
Pre-select the right country in a signup or checkout dropdown using a visitor's IP address, saving a scroll through a long list without ever removing their choice.
How satellite internet ranges complicate IP geolocation
A satellite internet connection can route traffic through a ground station far from the actual user, which makes IP geolocation for these networks noticeably less precise.
Filter bot traffic using ASN and network data
Data center and hosting networks show up clearly in ASN and organization fields, which is useful signal for filtering automated traffic.
How CGNAT affects IP geolocation for mobile users
Carrier-grade NAT pools large numbers of mobile subscribers behind a small number of public IP addresses, which puts a hard ceiling on how precise mobile IP geolocation can be.
Tell IPv4 and IPv6 visitors apart in your logs
Read the version field on an IP lookup to know whether a visitor connected over IPv4 or IPv6, and why the distinction matters for logs and quota.
Detect a visitor's country for tax and currency defaults
Use a visitor's IP address to set a sensible default country, tax rate, and currency before they type a single character into your form.
Geolocate a visitor by IP without a third-party script
Look up a visitor's approximate location from their IP address entirely on your server, with no JavaScript tag or browser script involved.
Mobile carrier NAT and what it does to IP accuracy
Thousands of phones on the same carrier network can share one public IP address. That single fact explains most of the accuracy limits on mobile geolocation.
How VPNs and proxies affect IP-based location data
A VPN does not hide a user from IP geolocation, it just relocates them to the exit server. Here is what that means for the data you get back.
Why IP geolocation is a network estimate, not a street address
An IP address identifies a network connection, not a physical address. Understanding that distinction prevents most IP geolocation disappointment.