What can someone do with your phone number? What to know before you give it to a match

Giving a match your number is a normal step, and most people who ask for it just want to text you. Your number does more than ring your phone, though. It links to your name in some places and to your messaging-app profiles. Many of your accounts also send login codes to it. Here is what someone can actually do with it, and how to close each gap before you share it.

Short answer: With your phone number alone, someone can look you up on people-search sites, see your WhatsApp profile photo (any user can by default), send you scam texts, and spoof your number on calls. The serious risks need more than the number: a carrier tricked into moving your number to their SIM, or a login code you read back to them. Add a PIN and a number lock with your carrier, never share a login code with anyone, and switch account logins from text codes to an authenticator app. Then a scammer can do far less with your number.

What someone can do with your phone number, and what stops it (checked October 16, 2026)

Each row comes from a US agency or the company's own help page.

Sources: the FTC's guides to people search sites, the Google Voice scam, two-factor authentication and spam texts, plus WhatsApp privacy settings, Signal phone number privacy, FCC on port-out fraud and FCC on spoofing.

Can someone find your address from your phone number?

Sometimes, through people-search sites. The FTC calls these sites a type of data broker, and says they build their reports from public records and other sources. In its guide to these sites, the FTC says that with just your name or phone number, someone could buy a report listing your current and previous addresses and the names of your family members, among other details.

Most of these sites let you tell them to stop selling your information, which the FTC calls opting out. Search a people-search site for your phone number or address and follow its opt-out steps, then do the same on the next site. Opting out has limits. Your details can still show up in reports about your relatives or neighbors, and opting out doesn't remove anything from public records, the FTC says.

If you are worried about someone finding where you live, don't share your main number until you have met and feel sure about the person.

Can someone hack your phone with just your number?

Putting the FCC and FBI pages next to the FTC's, we count three ways a number leads to someone getting into your phone or accounts, and none of them works from the number alone:

• Through your carrier. A scammer talks your phone company into moving your number to their SIM card or their account (the FCC and FBI pages below).
• Through a code you share. They ask you to read back a login code sent to your phone.
• Through a link in a text. The FTC warns that some scam texts can "install harmful malware on your phone that steals your personal or financial information without you realizing it."

None of the FTC, FCC, CISA or FBI pages we read on October 16, 2026 says a phone can be taken over from its number alone, and none says it can't. So don't tap links in texts you didn't expect, and keep your phone's software up to date. The FTC's advice on protecting your phone also starts with a passcode of at least 6 digits.

SIM swaps and port-out fraud: the risk to take seriously

This is the one that needs more than your number. In a SIM swap, a criminal convinces your carrier to move your service to a phone they hold. In port-out fraud, they move your number to an account at another carrier. Either way, as the FCC puts it, scammers who hijack your number "can assume your identity, intercept security protocols sent to your phone, and gain access to your financial and social media accounts."

People reported 971 SIM swap complaints and $17,366,758 in losses to the FBI in 2025, according to the IC3's 2025 Internet Crime Report. That is down from $48,798,103 in 2023, in the same report. These are only the cases people reported to the FBI.

For port-out fraud, the FCC says the first sign is usually your phone going dark or only allowing 911 calls. In a SIM swap, the FBI says your calls and texts are diverted to the criminal's device. In November 2023, the FCC adopted rules that require carriers to check who you are securely before moving your number, and to tell you right away when someone asks for a SIM change or a port-out.

Lock your number with your carrier

Ask your carrier for an account PIN if you don't have one; the FCC and the FTC both recommend it. Then turn on your carrier's lock. Each line below comes from the carrier's own help page, read on October 16, 2026.

Sources: Verizon on port-outs, Verizon on SIM Protection, T-Mobile account fraud help and AT&T Wireless Account Lock.

T-Mobile says its account PIN must have 6 to 15 numbers that don't run in sequence. Verizon notes that you need to turn SIM Protection off before you upgrade your phone.

Never read back a code

A match who asks you to send them a code from a text is running a scam. In one version the FTC describes, the scammer gets you to share a Google Voice code so they can set up a Google Voice number linked to your phone, then uses that number to cheat other people while hiding who they are. The FTC's rule: don't share any verification code with someone if you didn't contact them first. "That's a scam, every time."

The same goes for the dating app's own login code. Hinge says that if you log in with your phone number, don't share your SMS code with anyone.

Then make a stolen number less useful. The FTC says text codes are better than nothing, but "it's safer to use an authenticator app or security key, if they're an option," because a SIM swap can redirect your texts before you notice. Start with your bank, email, social media and payment apps. CISA's guidance, written for people at high risk such as officials, goes further and says not to use text messages as a second factor at all.

Before you give your number to a match

Keep chatting in the app first. Tinder and Hinge give the same reason: messages in the app are covered by their safety filters, and "users with bad intentions often try to move the conversation to text, messaging apps, email, or phone right away." Hinge's scam tips add: "If they only want to text, it's probably a red flag."

Call inside the app where you can. Bumble has in-app voice and video calls, so you can talk without swapping numbers. Tinder and Hinge no longer have calls in the app: Tinder's help page says its Face to Face video chat has been deprecated, and Hinge removed voice and video calling. Both still suggest a phone or video call before you meet, which now means a call outside the app. On Bumble in the US on an iPhone, a Bumble Handle lets someone find your profile without your number.

Use a second number. Google Voice gives you a separate number for calls and texts, and in the US you can choose it. You need a phone that can receive a text code to set it up, and Google now asks for a government-issued ID before a new number can call or text.

Set what your number shows on messaging apps. Once a match has your number, they can look for you on the apps that allow it. Our guide to finding social media by phone number shows how that works from their side. The settings to check:

• WhatsApp: Settings, then Privacy. Choose who sees your profile photo, about and last seen: Everyone, My contacts, My contacts except, or Nobody.
• Signal: Settings, then Privacy, then Phone Number, then Who can see my number and Who can find me by my number.
• Telegram: Settings, then Privacy and Security, then Phone Number.

Telegram says people who already know your number and saved it in their address book will always see it. On Signal, setting Who can see my number to Nobody still shows your number to people who saved it. Setting Who can find me by my number to Nobody hides your number from everyone, including them, though Signal warns it makes the app much harder to use.

Watch for texts that start with a wrong number. The FTC listed wrong-number texts among the top text scams of 2024, and says these scammers "strike up a fake friendship, often with romantic undertones." People reported losing $470 million to text scams in 2024, more than five times the 2020 figure, according to an FTC Data Spotlight published in April 2025.

If you already gave your number to a scammer

Your number on its own is not an emergency. What matters is what came with it.

1. Stop replying, and keep the messages. Don't send money or gift cards.
2. Lock your number. Add a carrier PIN and the lock in the table above.
3. Change how your accounts log you in. Move your bank and email logins to an authenticator app or security key first.
4. If your phone suddenly loses service, call your carrier straight away from another phone to take back your number. The FBI's advice starts the same way. It then says to change your passwords and contact your bank.
5. If you shared a code, change that account's password and turn on two-factor authentication. If someone linked a Google Voice number to your phone, Google explains how to disconnect your number from it. If you use Google Voice yourself, Google also explains how to reclaim your linked number.
6. Report it. Report the profile in the dating app, then report the scam at ReportFraud.ftc.gov and ic3.gov. For a stolen number, the FCC takes complaints for free. If someone has your Social Security or bank details, IdentityTheft.gov gives you a recovery plan. If you sent money, call your bank.
7. If you are in danger, call 911.

People reported $929,287,469 in losses to confidence and romance scams to the FBI in 2025, according to the IC3's 2025 Internet Crime Report, a category that also counts family and friendship scams. The FTC separately reported $298 million lost in 2025 to romance scams that started on social media, in a Data Spotlight published in April 2026. For what these scammers say, see signs of a romance scammer.

A quick check before a first date

TrulyWho checks a match's public accounts, photos and work from their email or phone in about a minute. Reports leave out dating and adult sites, and TrulyWho is not a consumer reporting agency, so it is for your own safety and never for jobs, credit or housing.

For the date itself, see how to stay safe on a first date.

FAQ

Is it safe to give your phone number to a dating match?

It is a normal step, and most matches who ask just want to text. Before you share it, keep chatting in the dating app for a while and add a carrier PIN and number lock. Also check who can see your photo on WhatsApp and who can find you on Signal. A Google Voice number keeps your main number private until you have met.

What information can someone get from your phone number?

Anyone with your number can see your WhatsApp profile photo under its default settings. On Signal, they can find you unless you set Who can find me by my number to Nobody, which hides your number even from people who saved it. The FTC says a people-search report bought with just your phone number can show where you have lived and who your relatives are. Most of these sites let you opt out, so they stop selling your information.

Can a scammer do anything with just your phone number?

A scammer with only your number can text and call you or fake your number on other people's caller ID. They can also try to get a login code out of you. To take over your accounts, they need more: your carrier moving your number to their SIM, or a code you read back. A carrier PIN and a number lock make the first much harder, and never reading a code to anyone stops the second.

What should I do if a match asks me for a verification code?

Don't send it, and stop talking to them. The FTC says anyone who asks for a code when you didn't contact them first is running a scam, every time. If you already sent it, change the password on that account and turn on two-factor authentication. Then report the profile in the dating app, and report the scam at ReportFraud.ftc.gov.

Should I use Google Voice for dating?

A Google Voice number is one way to keep your main number private while you get to know a match. It is free for personal use in the US. To set it up, you need a phone that can receive a text code, and Google asks for a government-issued ID before a new number can call or text. On Bumble, in-app calls work without swapping numbers at all.

What does it mean if my phone suddenly has no service?

A sudden loss of service, or a phone that only allows 911 calls, is usually the first sign of port-out fraud, according to the FCC. In a SIM swap, the FBI says your calls and texts are diverted to the criminal's device. Either way, call your carrier right away from another phone to take back your number. Then change your passwords and contact your bank. You can also report it to the FBI at ic3.gov.