Facebook's phone number search does not work the way most people expect
You cannot search Facebook by phone number from the Facebook app or website the way you can search by name. Facebook does not have a public phone number lookup tool. However, phone numbers are tied to Facebook accounts behind the scenes — and there are a few ways the connection surfaces, depending on what information the person has chosen to share and what privacy settings they have turned on.
The most direct route is if the person has listed their phone number on their public profile. If they have, a Google search for that number in quotes — like "555-123-4567" — will sometimes return their Facebook profile in the results. This works because Google indexes public Facebook profiles, and a phone number on a public profile becomes searchable.
The second route is Facebook's own "Find Friends" feature, which lets you upload a list of phone numbers or let Facebook scan your phone's contacts. If someone in your contacts has a Facebook account and has linked that same phone number to it, Facebook will suggest them as a friend. This only works if both people have the feature turned on and the phone number matches exactly.
Key Takeaways
- Facebook does not have a built-in phone number search tool on its main platform, but phone numbers linked to accounts can sometimes be found through Google if the person made that information public.
- The "Find Friends" feature in Facebook's settings can match phone numbers from your contacts to Facebook accounts, but only if the other person has linked that same number and has not hidden it.
- Phone numbers you provide to Facebook for account recovery or two-factor authentication are kept private by default and will not appear in searches.
- If someone has set their profile to private or hidden their phone number from their profile, searching by phone number will not reveal their account.
- Third-party people-search websites sometimes claim to link phone numbers to Facebook profiles, but these tools are often unreliable and may violate Facebook's terms of service.
How the Find Friends feature works with phone numbers
When you open Facebook on your phone and go to the "Find Friends" section, you will see an option to sync your contacts. If you allow Facebook to access your phone's contact list, it compares each number against the phone numbers people have added to their Facebook accounts. If there is a match, Facebook suggests that person as a friend.
This only works if the other person has actually linked their phone number to their Facebook account — and most people do, either during signup or when they set up two-factor authentication. However, the person must also have their phone number visible in their privacy settings. By default, Facebook keeps phone numbers private, so even if someone has linked a number to their account, it will not show up in a Find Friends search unless they have changed that setting.
You can also manually upload a list of phone numbers to Facebook without syncing your entire contact list. Go to "Find Friends," select "Upload Contacts," and choose a file. Facebook will then search for accounts matching those numbers. This method leaves no permanent record on your phone and gives you more control over which numbers you are searching.
When Google can find a Facebook profile by phone number
If someone has added their phone number to their Facebook profile and set that information to "Public," Google's search engine will index it. Searching Google for a phone number in quotes — "555-123-4567" — may return that person's Facebook profile if the number appears anywhere on their public profile page.
This is not a Facebook feature; it is how Google indexes public web pages. Facebook profiles are web pages, and Google treats them like any other page. If the profile is set to private, Google cannot see the phone number and will not return it in search results. If the profile is public but the phone number is set to private within the profile, Google also will not index it.
The reliability of this method varies. Some profiles show up in Google search results within hours; others take weeks or never appear at all. Facebook also changes how it allows Google to index profiles, so a number that was findable last month may not be findable now.
What phone numbers Facebook keeps private by default
When you add a phone number to Facebook for account recovery or two-factor authentication, Facebook does not make that number public or searchable. These numbers are stored in your account settings and are only used by Facebook to help you log back in if you forget your password or to send you security codes.
Even if someone knows your phone number, they cannot use it to find your Facebook account through Facebook's official search tools unless you have explicitly added that number to your public profile. This is a privacy protection built into Facebook's design.
If you want to keep your phone number completely private, check your Facebook privacy settings. Go to Settings & Privacy > Settings > Personal Information, and make sure your phone number is set to "Only Me" or is not listed at all. You can also remove your phone number from your profile entirely if you do not want it searchable.
Why third-party phone lookup sites are unreliable
Several websites claim to search Facebook by phone number or to link phone numbers to social media profiles. Most of these tools are either outdated, inaccurate, or in violation of Facebook's terms of service. Facebook actively blocks automated scraping of its data, so any tool that claims to search Facebook's database directly is either not actually searching Facebook or is using methods Facebook has prohibited.
Some of these sites collect data from public sources and build their own databases, which means the information may be incomplete, outdated, or wrong. Others ask you to pay for results that are often no better than a free Google search. A few may ask for your own phone number or personal information as part of the "search," which creates a privacy risk for you.
If you are trying to find someone, the most reliable methods are still the ones Facebook itself provides: searching by name, using the Find Friends feature with phone numbers from your contacts, or asking mutual friends if they can help you connect.
Privacy settings that affect phone number visibility
Your phone number visibility on Facebook is controlled by two separate settings. The first is whether you have added a phone number to your profile at all. The second is who can see it if you have.
To check your settings, go to Settings & Privacy > Settings > Personal Information. Look for "Phone" in the list. If it is there, click on it and you will see a privacy dropdown — usually set to "Only Me," "Friends," or "Public." If the dropdown is set to "Public," your number can be found by anyone searching Facebook or through Google. If it is set to "Friends," only people you have friended can see it. If it is set to "Only Me," no one else can see it at all.
You can also remove your phone number from your profile entirely by clicking the X next to it. This does not delete the number from Facebook's systems — it just removes it from your visible profile. The number will still be associated with your account for login and security purposes.
What happens if someone finds your profile through your phone number
If someone finds your Facebook profile using your phone number, they can see whatever information you have set to public: your profile picture, your name, your cover photo, and any posts or photos you have marked as public. They cannot see private messages, friend lists (unless you have made that public), or posts you have shared only with friends — unless they are already your friend.
If you do not want people to find you this way, the simplest step is to remove your phone number from your public profile or set it to "Only Me." You can also adjust your overall profile privacy so that only friends can see your profile at all. Go to Settings & Privacy > Settings > Privacy, and change "Who can see your profile?" from "Public" to "Friends" or a custom setting.
If someone is searching for you repeatedly or using your phone number to contact you through Facebook in a way that makes you uncomfortable, you can block them. Blocking prevents them from seeing your profile, sending you messages, or finding you through search.
Frequently Asked Questions
Can Facebook tell me who searched for my phone number?
No. Facebook does not notify you when someone searches for you or uses the Find Friends feature to look up your number. You have no way to see who has searched for you or tried to add you as a friend through phone number matching.
If I search someone's phone number on Google and nothing comes up, does that mean they do not have Facebook?
Not necessarily. It means either they do not have Facebook, or they do have it but have not made their phone number public, or Google has not indexed their profile yet. The only way to know for sure is to search for them by name or ask them directly.
Does Facebook sell my phone number to third-party sites?
Facebook does not sell phone numbers to third-party companies. However, if your phone number is public on your profile, anyone can see it and collect it. Third-party data brokers sometimes scrape public information from social media and sell it, but that is different from Facebook selling your data.
Can I search for someone's Facebook using a phone number they texted me from?
Only if that exact number is linked to their Facebook account and set to public. A phone number from a text message might belong to a phone carrier, a business line, or a number the person no longer uses. Searching it on Facebook will only work if it matches the number they have currently linked to their account.
What if someone is using a fake phone number on their Facebook profile?
If someone has linked a phone number that is not actually theirs, searching that number will still find their profile. Facebook does not verify that phone numbers belong to the person who entered them. This is one reason why phone number searches are not always reliable for confirming someone's identity.