Find out your current IP address
You want to know what is your public IP address ? Whether for technical or security reasons, or to resolve a blocked access to a site, this page allows you to :
✅ Show your IPv4 address
✅ Show your IPv6 address (if available)
✅ See the host names (reverse DNS) associates
✅ And if needed : send an IP unblocking request
ℹ️ Your IP is your identity on the Internet.
This is the address used to communicate with remote servers, websites, applications and services.
IPv4 and IPv6: why two IP address formats?
- IPv4 is the historical format (e.g.
192.0.2.1), still in the majority today. - There are approximately 4.3 billion possible IPv4 addresses (2³²). This number is insufficient for the whole world.
- IPv6 was introduced in response to this shortage: with 2¹²⁸ possible addressesthis represents approximately :
340,282 366,920 938,463 463,374 607,431 768,211 456 addresses
(yes, that's 340 undecillions 😅)
Thanks to IPv6, every connected device can have a unique address, with no NAT and no growth limits.
What is rDNS (reverse DNS)?
Visit reverse DNSor rDNSis the reverse of conventional DNS resolution.
While DNS (Domain Name System) allows you to translate a domain name (e.g. www.lrob.fr) into an IP address, rDNS allows you to find the domain name associated with an IP address.
For example, the IP 192.0.2.123 could have an rDNS like client-192-0-2-123.dsl.provider.net.
rDNS is often used for :
- Identify a remote server or client
- Checking an IP's legitimacy in e-mail exchanges (anti-spam)
- Facilitate security logs and audits
Please note: not all IPs have rDNS configured. The absence of a reverse DNS is not a problem in itself, but its presence often brings better visibility and reliability.
Why might your IP be blocked?
At LRobWe constantly monitor the status of hosted services.
In the majority of cases where a user thinks their site is offline, the real cause is as follows:
The user's IP was automatically blocked by server security.
It can happen:
- After several failed connection attempts
- Following unusual or automated requests
- Sometimes even due to incorrect plugin or client-side software configuration
This is what we call a false positive.
Blocking is rare, but it's the most frequent support request we receive.
Before: a complicated process
It required :
- Redirect the user to a third-party site to find out his or her IP address
- Ask him to copy the information cleanly (not as a screenshot... 😬)
- Manually analyze data to unlock access
The result: wasted time, mistakes and frustration for everyone.
Now: a complete, in-house tool
We've developed a simple solution, available right here on our websitewhich allows you to :
- Know your IP addresses immediately
- Send them in one click to our team via a form
- Unblock your IP automaticallyafter verification
All with a Integrated captcha to prevent automated abuse.
A technical challenge: detecting IPv4 and IPv6
An important technical detail: when a user visits a page, the server sees only one IPdepending on its network configuration (generally IPv6 if available).
To get around this, we have set up an original architecture:
- Two sub-domains :
ipv4.lrob.net(forced in IPv4 only)ipv6.lrob.net(forced in IPv6 only)
- Each returns the IP address seen, via a JSON request
- The main page combines both to display your two IPs if available
🎯 The whole without using third-party services100 % hosted on our infrastructure, respectful of your privacy.
Who can use this tool?
This tool is public, and can be used to :
- Our customers who need unlock their access
- Other system administrators or webmasters
- Anyone curious to see what its real IP on the Internet is
Access the tool
💡 And if you're a hosting professional or freelancer, don't hesitate to use it for your own customers. The tool is freely accessible.
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