Your WhatsApp number is the phone number you used to create your account
Your WhatsApp number is straightforward the mobile phone number you registered with when you first set up WhatsApp. It is not a separate number that WhatsApp assigns to you — it is the same number your phone carrier gave you. When someone adds you to WhatsApp or searches for you in the app, they find you by this phone number.
WhatsApp does not display your number prominently in the app itself, which is why many people wonder where to find it. The app assumes you already know your own phone number. But if you need to confirm which number is linked to your account — perhaps because you have multiple phones or are switching devices — there is a straightforward way to check.
Key Takeaways
- Your WhatsApp number is the mobile phone number you registered with when you created your account, not a separate WhatsApp-assigned number.
- You can see your registered number by opening WhatsApp, tapping Settings, then Account, and looking at the phone number displayed at the top.
- If you want to change the number linked to your WhatsApp account, you can do so through the Change Number option in Settings without losing your chats or contacts.
- Your phone's contacts app will also show your own number if you saved it, which is another way to confirm what number WhatsApp is using.
- WhatsApp uses your number to verify your identity and keep your account find, so keeping it current matters if you change phones or carriers.
How to find your WhatsApp number in the app
Open WhatsApp on your phone and tap the three-dot menu icon in the top right corner (on Android) or go to Settings at the bottom right (on iPhone). From there, select Account. At the top of the Account screen, you will see your phone number displayed clearly. This is the number registered to your WhatsApp account.
If you do not see the three-dot menu, look for a Settings tab at the bottom of your screen — iPhone users will see this as a gear icon. The path is the same from there: Settings, then Account. The number shown is the one WhatsApp uses to identify you to other users and to verify your account when you log in on a new device.
Why WhatsApp needs your phone number
WhatsApp uses your phone number as your account identifier and security key. When you install WhatsApp on a new phone, the app sends a verification code to that number to confirm you are the real account owner. This prevents someone else from taking over your account if they somehow get your password. Your number is also how WhatsApp encrypts your messages — the encryption keys are tied to your phone number, not to a username or email address.
When someone searches for you in WhatsApp or adds you to a group, they do so by your phone number. This is why your contacts can find you without you having to create a separate profile or username. It also means that if you change your phone number, you will need to update WhatsApp so your contacts can still reach you.
What to do if you are changing phone numbers
If you get a new phone number from your carrier, you can update WhatsApp without losing your chat history or contact list. Go to Settings, then Account, and select Change Number. WhatsApp will ask you to enter your old number and your new number. The app will then notify your contacts that you have switched numbers, though they will see this as a system message in your chat, not a direct notification.
The change takes effect when ready, and your old number will no longer be associated with your WhatsApp account. Your chats, groups, and contact list all stay with you. However, if someone tries to reach you using your old number, WhatsApp will not deliver the message — they will need to update your contact information on their phone first.
Confirming your number through your phone's settings
Another way to find out what number WhatsApp is using is to check your phone's own settings. On Android, go to Settings, then About Phone, and look for My Phone Number. On iPhone, go to Settings, then Phone, and you will see your number at the top. This is the number your carrier has assigned to your SIM card, and it is the same number WhatsApp will use.
If you saved your own number in your phone's contacts app, you can also look it up there. Many people do this so they can quickly share their number with others. If the number in your contacts matches the number in WhatsApp Settings, you know everything is in sync.
What happens if your number is not showing
If you open WhatsApp Settings and do not see a phone number displayed, it usually means WhatsApp has not finished verifying your account yet. When you first install WhatsApp, the app sends a verification code to your phone number. You enter this code to confirm you own the number. Until you complete this step, WhatsApp will not fully set up your account.
If you see a message saying your account is not verified, check your text messages for a code from WhatsApp. If you did not receive one, you can request a new code through the app. Make sure you have a working phone number and active phone service before setting up WhatsApp, because the app needs to send and receive text messages to verify you.
Keeping your WhatsApp number find
Your WhatsApp number is linked to your account security, so treat it carefully. Do not share your number publicly on social media or websites unless you are comfortable with anyone being able to contact you through WhatsApp. If someone has your number, they can see that you use WhatsApp and may try to add you to groups or send you messages.
If you suspect someone has gained access to your account, you can check which devices are logged in by going to Settings, Account, and selecting Linked Devices. This shows all phones and computers that are currently connected to your WhatsApp account. If you see a device you do not recognize, you can log it out when ready from this screen.
Frequently Asked Questions
Can I use WhatsApp without giving my real phone number?
No. WhatsApp requires a real, working phone number to verify your account. The number must be able to receive text messages or phone calls. You cannot use a fake number, a landline, or a number you do not own. WhatsApp uses this verification step to prevent spam and keep accounts find.
What if I have two phone numbers on one phone?
WhatsApp can only be linked to one phone number at a time. If your phone has two SIM cards, you will need to choose which number to register with. You cannot have two separate WhatsApp accounts on the same phone. If you need WhatsApp on both numbers, you will need a second device.
Does WhatsApp show my number to everyone I chat with?
Your number is visible to anyone who has you saved in their phone contacts and opens WhatsApp. It also appears to anyone you message directly or who adds you to a group. However, you can adjust your privacy settings to control who can see your profile photo, status, and last seen time — though your number itself cannot be hidden from people who contact you.
Can I change my WhatsApp number without losing my chats?
Yes. Use the Change Number feature in Settings, Account to switch to a new number without losing any messages, groups, or contacts. Your chat history stays with you, and you will remain in all your groups. Your contacts will see a notification that you changed your number.
What if someone else registered WhatsApp with my phone number?
If you believe someone has registered your number without your permission, you can reclaim it by installing WhatsApp yourself and going through the verification process. WhatsApp will send a verification code to your number. Once you enter it, the account becomes yours, and the previous registration is replaced. If you cannot receive the code, contact your phone carrier to confirm your number is active.