The fastest way to find your iPhone's phone number

Open Settings, tap Phone, and look at the line labeled My Number. Your phone number appears there in full. This is the same number your carrier assigned when you activated the phone, and it is the number people use to call or text you.

If My Number appears blank or shows only dashes, your SIM card may not have activated fully yet, or your carrier has not yet synced the number to your phone. Wait a few minutes and check again, or restart your iPhone by turning it off and back on.

You can also find your number in the Phone app. Open Phone, tap Keypad at the bottom, and dial *#100# (or *#1# on some carriers). Your number displays on the screen. This method works on most carriers but not all — if nothing happens, use the Settings method instead.

Key Takeaways

  • Your iPhone's phone number is in Settings > Phone > My Number, and this is the fastest way to find it.
  • If My Number shows blank, your SIM card may still be activating — wait a few minutes and try again.
  • Dialing *#100# in the Phone app also displays your number on some carriers, though Settings is more reliable.
  • Your phone number is the one your carrier assigned at set up, not a number you chose yourself.

Why your phone number might not show up

A blank My Number field usually means your SIM card has not finished activating with your carrier. This is most common on new phones or after switching carriers. Restart your iPhone and check again after a few minutes. If it still does not appear, your SIM card may be damaged or inserted incorrectly.

Remove the SIM card by ejecting the tray with the small pin that came in your iPhone box (or a straightened paperclip). Look at the gold contacts on the card — they should be clean and shiny, not scratched or tarnished. Reinsert the card firmly into the tray, making sure it sits flat, and push the tray back in until it clicks. Then restart your phone.

If the number still does not appear after 24 hours, contact your carrier directly. They can confirm whether the SIM card is active and resend the set up signal to your phone. Have your account number or phone number (if you know it from another device) ready when you call.

Where else your phone number appears on your iPhone

Your phone number also shows in the Contacts app under your own contact card. Open Contacts, scroll to the top, and tap your name (usually labeled "Me" or your first and last name). Your phone number appears in the card along with your email address and other contact details you have entered.

You can also find your number on your physical SIM card itself. The number is printed on the back of the card in small text, though it can be hard to read. This is useful if your phone is not turning on or if you need to verify the number without powering on the device.

Your carrier's website or app also displays your phone number. Log in with your account credentials, go to Account or My Phone, and your number appears there. This is helpful if you want to confirm the number your carrier has on file, which should match what appears in Settings.

What to do if you have multiple phone numbers

If your iPhone supports Dual SIM (iPhone XS and newer models), you may have two phone numbers — one on a physical SIM card and one on an eSIM (a digital SIM built into the phone). To see both numbers, open Settings, tap Phone, and look for separate entries for each SIM. The physical SIM number appears under one label, and the eSIM number under another.

You can also check which number is active for calls and texts. Go to Settings > Phone > Default Voice Line or Default SMS Line to see which SIM is set as primary. If you want to use the other number for calls or texts, you can change these settings here.

If you have added a Google Voice number or another VoIP service to your iPhone, that number is separate from your carrier phone number. It appears in the Google Voice app or the VoIP app you are using, not in Settings > Phone. Your carrier phone number is always the one in Settings > Phone > My Number.

Sharing your phone number safely

Once you know your phone number, be cautious about where you share it. Avoid posting it publicly on social media, in online forums, or on websites where strangers can see it. Scammers and spam callers buy lists of phone numbers and use them to target people with fake offers or phishing attempts.

When you need to share your number, use direct messages or private channels instead of public posts. If you receive calls or texts from unknown numbers claiming to be from your bank, Apple, or your carrier, do not give them any information — hang up and call the official number on your bill or the company's website instead.

If your phone number is being used for spam or scam calls, you can block the incoming numbers in the Phone app. Open Phone, find the number in your call history, tap the info icon (i), and select Block this Caller. You can also report the number to your carrier for investigation.

Frequently Asked Questions

Can I change my iPhone's phone number myself?

No, you cannot change your phone number through your iPhone's settings. Your phone number is assigned by your carrier and tied to your SIM card and account. To change your number, contact your carrier directly — most allow you to request a new number for free once per account, though some charge a small fee.

What if I just got a new iPhone and do not know my number yet?

Check Settings > Phone > My Number first. If it is blank, wait 24 hours for your SIM card to set up. You can also call your carrier's customer service number (printed on your bill or SIM card packaging) and they will tell you your number. If you have another phone, you can text a friend and ask them to tell you what number appears when you call them.

Is the number in Settings > Phone the same as my Apple ID?

No, they are different. Your phone number is assigned by your carrier and is used for calls and texts. Your Apple ID is a separate account you create for Apple services like iCloud, the App Store, and FaceTime. You can see your Apple ID in Settings > [Your Name] at the top of the screen.

Why does my phone number show a different format in different places?

Your phone number is the same everywhere, but it may display with different formatting — for example, (555) 123-4567 versus 555-123-4567 versus 5551234567. These are all the same number, just written differently. Your carrier and apps format it based on their own preferences, but the actual digits are identical.

Can I use my iPhone's phone number for WhatsApp or other apps?

Yes, many messaging apps use your phone number to set up your account. When you open WhatsApp, Telegram, or similar apps for the first time, they ask for your phone number and send you a verification code via text. This confirms that you own the number. You can then use that app to message people, and they can reach you through it using your phone number.