NAT64Check is a tool developed by the Internet Society in collaboration with Stichting IPv6 Nederland, Go6, SJM Steffann, Internetbureau Max and Simply Understand. This allows you to enter the URL of a particular website, and then run tests over IPv4, IPv6 and NAT64 in order to check whether the website is actually reachable in each case, whether identical web pages are returned, and whether all the resources such as images, stylesheets and scripts load correctly. It also compares responsiveness using the different protocols, therefore  allowing network and system administrators to easily identify anything is ‘broken’, to pinpoint where any non-IPv6 compatible elements need to be fixed.

Robtex uses various sources to gather public information about IP numbers, domain names, host names, Autonomous systems, routes etc. It then indexes the data in a big database and provide free access to the data.

We aim to make the fastest and most comprehensive free DNS lookup tool on the Internet.

Our database now contains billions of documents of internet data collected over more than a decade.

Je n'ai rien à cacher. En fait si, et vous également !

Do Not Track est une série documentaire personnalisée
consacrée à la vie privée et à l'économie du Web.

For many years, DomainTools has served the domain professional community with Whois and domain name research tools to drive your investments, research buyers, find new domains and manage existing portfolios.

Like telephone numbers there are directories that relate the IP addresses to names such as "cnn.com". These names are called domain names and the directories are run on servers called Domain Name Servers or DNS. A Reverse DNS Lookup queries these servers in an attempt to find a match.

The Zero Day Initiative (ZDI), founded by TippingPoint, is a program for rewarding security researchers for responsibly disclosing vulnerabilities. Depending on who you are, here are a few links to get you started:
Researchers: Learn how we pay for your vulnerability discoveries, register for the ZDI or login.
Vendors: Read our disclosure policy or join our security partner program
Press, Curiosity Seeker: Learn more about ZDI or read answers to some frequently asked questions
Please contact us at zdi [at] trendmicro [dot] com with any questions or queries. For sensitive e-mail communications, please use our PGP key.

InfoByIp.com provides IP detection, geolocation and weather forecast. Both IPv4 and IPv6 are supported. Geolocation determines country, state and city of the IP address as well as latitude, longitude and altitude. In addition browsers properties are shown when displayed IP is the client IP. Browser properties include user agent, screen resolution and size, color depth, list of installed plugins, local time, java and flash support.

There are many ways to make a presence on the web and a website is just one of them. Other types of web presence include social media channels and sites that allow customers to review your business. Before you start making a website, make sure you understand what’s provided by the different types of web presence and the costs and benefits associated with each type.

Hurricane Electric operates its own global IPv4 and IPv6 network and is considered the largest IPv6 backbone in the world as measured by number of networks connected. Within its global network, Hurricane Electric is connected to over 150 major exchange points and exchanges traffic directly with more than 6,000 different networks. Employing a resilient fiber-optic topology, Hurricane Electric has no less than four redundant paths crossing North America, two separate paths between the U.S. and Europe, and rings in Europe and Asia. In addition to its vast global network, Hurricane Electric owns and operates two data centers in Fremont, California - including Hurricane Electric Fremont 2, its newest 200,000 square-foot facility. Hurricane Electric offers IPv4 and IPv6 transit solutions over the same connection. Connection speeds available include 100GE (100 gigabits/second), 10GE, and gigabit ethernet.