How to find my Facebook ID number and someone else's - Find out here

When you sign up for Facebook, you are assigned a unique 15-digit number that identifies you, similar to a passport number or school roster number. In this article we show you how to find out my Facebook ID number and someone else's , and what is this number for.

What is the Facebook ID number?

When you create or create an account on Facebook, you enter your first and last name, as well as your email and a password. Facebook uses your email address and password to log in, as well as your first and last name to create your profile, but… Have you ever wondered how Facebook identified you ?

After all, there are a lot of people with the same name. In fact, if you search for your first and last name on Facebook right now, there is most likely at least one person with the same last name as you.

For this reason, Facebook does not identify you using your name, or any of the data you enter on Facebook, but with a completely random number which is created when you register on the social network.

This number is not confidential, because it is not a password or a key , but rather a list number at the school. It's a number they use to find out who you are.

This number is public and is not only used by Facebook itself, but also by all apps and games that you log into using Facebook.

This number is unique, no two users have the same number. And since it is a 15 digit number , there is a maximum of one quadrillion possible numbers in the Facebook system.

This may sound like a lot, but it's not so much considering that not only do users have ID numbers, but also all groups and all applications and publications available on the site. Still, the numbers are very unlikely to run out anytime soon.

How to find this identification number?

In the past, this number was part of each person's profile URL. Facebook URLs looked - and still do - something like this: "facebook.com/john.doe.123456", but with the number of profiles and pages created each day, that style no longer works.

Now the ID is based on a variety of settings , and although it is possible to calculate it manually, it is difficult and very inconvenient. That is why there are services that allow you to know this number automatically.

External services

The easiest way to find your Facebook ID is to use one of the many external services who will do it quickly. You just need to copy and paste the URL of your profile Facebook or the person you want to search.

Facebook Messenger

If you open Facebook Messenger in your PC browser, you pouvez have see anyone's ID . From Messenger, you can open the profile of a person you are talking to by clicking on their name. However, when you do this, Facebook will take you to your profile using your ID code.

If you right click on their name and hit "copy url", you will have something that looks like this: "facebook.com/123456789012345". This number is the person's ID.

What is this number for?

Facebook is a very large social network, and it is connected to many other websites and apps. Many of these sites have "Connect with Facebook" buttons and other features that use Facebook.

Instead of giving your personal information to each site, Facebook uses this number. This number identifies you, but does not contain personal information. Whenever Facebook needs to identify you personally, Facebook will use this number to avoid constantly manipulating your private data.

There are also practical uses for this number. You can use it, for example, to enter your profile. As your identification number does not change, you can use this number to enter your profile even if you change url in the settings. Simply type "facebook.com/123456789012345", in replacing this number with your username.

In conclusion, this number is very easy to find, and very useful when it comes to identifying you personally while preserving your online privacy.