IP Library
18 practical guides, each with its own dedicated page.
Choose a topic to open the full article. Each card points to an independent URL with its content visible directly in the HTML.
How to use this library
The guides are organised to start from a simple question and move toward diagnosis. If you want to understand the result shown on the home page, start with IP addresses, the difference between public and private IPs, then IP geolocation. If you need to solve a problem, the DNS leak, IPv6 leak, IP blacklist, CGNAT and ping/latency pages provide more concrete checks.
Each guide explains interpretation limits. An IP address does not directly identify a person, a city may be approximate and the provider shown may correspond to a VPN, hosting company or shared infrastructure. This approach avoids quick conclusions and makes tests more reproducible.
What is my IP address?
Understand your public IP, your private IP and the methods to find it.
Read article NetworkIPv4 vs IPv6: what are the differences?
Format, capacity, security and transition between the two versions of the IP protocol.
Read article PrivacyHow to hide your IP address?
VPN, proxy, Tor and real limits of online anonymity.
Read article VPNWhat is a VPN and how does it work?
Definition, encrypted tunnel, benefits and use cases of a VPN.
Read article IP AddressPublic IP vs Private IP
The difference between the address visible on the Internet and addresses on the local network.
Read article NetworkWhat is an ISP?
The role of your Internet service provider in assigning and routing your IP.
Read article GeolocationHow does IP geolocation work?
What a GeoIP database can actually deduce from an IP address.
Read article GeolocationDoes my IP reveal my exact location?
Why an IP rarely gives a precise address, and how to limit tracking.
Read article PrivacyWhat is a proxy?
Definition, types of proxies and the difference with a VPN.
Read article NetworkWhat is the ASN of an IP address?
Understanding autonomous networks and their role in Internet routing.
Read article SecurityHow to check if an IP is blacklisted?
Blacklists, common causes and verification tools.
Read article VPNDNS leak: what is it?
Understanding DNS leaks and testing them when using a VPN.
Read article PerformancePing, latency and jitter
Reading the measurements that explain the responsiveness of an Internet connection.
Read article NetworkWhat is CGNAT?
Understanding why a public IP can be shared by several subscribers.
Read article VPNIPv6 leak: what is it?
Identifying IPv6 leaks that expose a connection despite a VPN.
Read article DNSPublic DNS or ISP DNS?
Comparing privacy, speed and reliability based on the DNS resolver chosen.
Read article SecurityWhy use a password manager?
Create unique credentials and reduce the risk of compromised accounts.
Read article PrivacyEncrypted storage: protecting sensitive files
Understanding encryption of documents, backups and sensitive shares.
Read article