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Detecting VPN Services
Systematic VPN Detection
Published: April 9, 2024

VPN Detection is an integral part of the API and is covered by the is_vpn API flag. This blog article introduces a systematic process that demonstrates how to detect most well known VPN providers. It turns out that systematic VPN exit node enumeration is the most reliable method of detecting VPN IP addresses.

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Introducing the Abuser Score for Organizations and ASNs
Published: January 30th, 2024

This blog post covers the new abuser_score API field that was recently added to the API. The abuser_score can be found both in the company object and the asn object. The abuser_score is a very helpful metric that quickly gives an overall estimation how reputable the whole ASN or network is.

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How to Filter Malicious Traffic with ipapi.is
Published: January 7th, 2024

This tutorial provides an in-depth explanation of how to use ipapi.is to protect your website or app from unwanted or malicious traffic. The article discusses the strengths and weaknesses of ipapi.is honestly and explains how to use the API most effectively from an IT security perspective.

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Enrich IP API Data with Reverse DNS Lookups
Published: November 19, 2023

This blog article explores whether using Reverse DNS lookups across the entire IPv4 address space can enrich IP API data. The idea is to utilize Reverse DNS data to enhance IP Geolocation accuracy and to determine the connection type of IP addresses.

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Scraping the Complete IPv4 WHOIS Address Space
Published: October 2, 2023

WHOIS data is the most crucial data source for ipapi.is, as it allows the derivation of the organization that owns a specific IP address. Additionally, WHOIS records can be used to derive useful metadata such as domain names, email addresses, and geolocation intelligence.

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An Algorithm to Detect Hosting Providers and Their IP Ranges
Published: September 13, 2023

In this blog post, we describe in depth how the IP ranges of a substantial part of the hosting providers on the Internet can be detected. Knowing whether an IP address belongs to a hosting provider or not helps in making better IT security decisions.

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