What does a wa.me link tell you about a number?
Whether the number holds an active WhatsApp account, and nothing beyond that.
WhatsApp's own click to chat documentation states the condition: you can open a chat with somebody whose number you have never saved, as long as they have an active WhatsApp account. The link is https://wa.me/<number>, with the number in full international format and every leading zero, bracket and dash removed.
So it is a registration test rather than a lookup. A chat window opens or it does not, and which of those happens is the entire answer.
Read that answer narrowly. A registered number tells you the line has been in use by somebody at some point; it says nothing about who holds it today.
Opening the link is not contact. A wa.me link opens a chat window on your own device. Nothing reaches the other person until you send a message, and the optional pre-filled text only drops words into your own message box.
What can a stranger see on a WhatsApp profile?
By default: the profile photo, whether the account is online, and read receipts. Not the About text, and not last seen.
That split is set out in WhatsApp's privacy settings article, which lists the defaults in two lines. Any user can see your profile photo, your read receipts and when you are online. Your contacts — people who hold you in their address book — can additionally see your About text, your statuses and when you were last seen.
The name is a separate matter. What appears above the chat for an unsaved number is the name the account holder typed into their own profile, and no part of it is verified against anything.
The number was the field nobody could hide until usernames arrived in June 2026: an optional handle that stands in for it.
Meta's own pages disagree on how far it reaches, and neither has been reconciled with the other. A number is still required to hold an account, and no directory of usernames is searchable.
The settings that decide what shows
Each field a stranger might read has its own setting, and the choices are the same four throughout: Everyone, My Contacts, My Contacts Except… and Nobody.
What differs is the starting position. Read the table as a description of an account nobody has touched, because most people never touch it.
| What is exposed | Default for a stranger | Options | The catch |
|---|---|---|---|
| Profile photo | Visible to any user | All four | Also appears in your contacts' notifications |
| About text | Contacts only | All four | Blank to a stranger |
| Last seen and online | Online yes, last seen no | All four | Everyone still means people you have messaged |
| Read receipts | On | On or off | Switching off is reciprocal |
| Who can add you to groups | Everyone | All four | Invite links ignore it |
The number is the account. Everything above it in the chat header is a setting somebody chose, and none of it is checked against anything.
Can you see when someone was last online?
Almost never, if you are a stranger to the account.
WhatsApp's last seen and online article defines both states plainly. Online means the person has WhatsApp open on a device and is connected; last seen is when they last used it. Neither means your message has been read.
Two documented rules narrow it further. The setting is reciprocal, so hiding your own last seen removes everybody else's from your view, and even the Everyone option shows last seen only to people who have messaged you, called you or saved you as a contact.
A blank last seen is therefore the ordinary case rather than a signal. It describes the setting and your relationship to the account, not the person behind it. Typing indicators are the exception: anyone in an open chat with you sees when you are typing.
Read receipts, and the price of turning them off
The ticks are a three-state delivery report, and switching them off costs you exactly the information it denies everybody else.
One tick is sent, two are delivered to the recipient's phone or a linked device, and two blue are read. In a group the second tick appears once every member has received the message, and turns blue once every member has read it.
WhatsApp states the trade in a line: turn read receipts off and you cannot see read receipts from other users. The same switch hides who viewed your status updates, in both directions. Group chats are exempt, and receipts are always sent there.
Missing blue ticks prove nothing on their own. WhatsApp lists a blocked sender, an unopened conversation, a connection problem and the privacy setting itself among the causes, and none of them is distinguishable from outside.
What does a WhatsApp business account publish?
Considerably more than a personal one, and deliberately so.
WhatsApp's business profile documentation lists what the profile carries: business name, description, address, opening hours, products and services, pricing tier, responsiveness, and the month and year the account joined. An email address, a website and a linked Facebook Page or Instagram profile can sit alongside them.
The catalogue is the other half, and it is unusually open. WhatsApp notes that a blocked user can still view both the profile and the catalogue.
The verified badge is worth reading precisely. Meta describes it as verification of the account through a multi-step process using activity across Meta products or documents supplied, and Meta Verified is a paid monthly subscription that includes it. The badge attests to the account, not to the trading.
What does a shared group show about a member?
Every member's phone number, to every other member, with no setting that changes it.
WhatsApp says so in the privacy settings article: it is not currently possible to hide a group member's phone number in a group. That makes a shared group the widest exposure on the platform, and it is the one most people think least about.
Getting somebody into one is easy by design. WhatsApp's group privacy article states that anyone holding your phone number can add you to a group, that the default setting is Everyone, and that an invite link bypasses the setting entirely.
Two side effects follow for anybody reading a group. Read receipts are always sent there whatever each member has chosen, and the message info screen keeps listing members who have since left.
What does the profile behind a cold pitch show?
Treat it as one, and notice what the profile is doing before you reply.
The recognisable shape is a profile that reads as a person — a photograph, a warm About line, a first name — sitting on a number whose country code has nothing to do with the company being named. The photograph is the cheapest part of that to assemble, precisely because it is visible to any user by default.
Everything the number itself can settle is set out in is this phone number a scam, and it is not re-argued here. The short version is that how the message reached you decides more than the digits do.
The photograph is the weakest part of the story. A profile photo is readable by any user by default, which is also why it is the part a stranger has most reason to borrow. Run it through reverse image search before you weigh anything else.
What a phone report here covers, and what it does not
Not WhatsApp. The checks in this post are ones you run by hand in about a minute, and it is worth being plain about that.
The DetectiveCheck phone module reaches 8 sources: the line's validity, its carrier and line type, an account-existence check against PayPal, Binance and Facebook, and a sweep for public mentions. Brazilian numbers additionally get the region behind the area code, PicPay and Pix.
WhatsApp is not among them, and the phone lookup page lists what is. An email address reaches 71 sources by comparison, which is the honest thing to know before paying for a phone report.
Use the two halves together. The report says what kind of line it is, while the wa.me link and the profile say whether anybody has been living on it. The reverse phone lookup guide covers the first half in full.
Common questions
How do I check if a phone number is on WhatsApp?
Open https://wa.me/<number> with the number in full international format and no zeroes, brackets or dashes. WhatsApp's click to chat feature only opens a chat for a number with an active WhatsApp account, so the link opening is the confirmation. It reports registration and nothing more, and it identifies nobody.
Does opening a wa.me link notify the person?
No. The link opens a chat window on your own device, and nothing reaches the other end until you send a message. Even the optional pre-filled text parameter only places words in your own message box, ready to send or delete. No notification, no read receipt and no record on their account results from opening it.
Can a stranger see my WhatsApp profile photo?
By default, yes. WhatsApp's documented default is that any user can see your profile photo, your read receipts and when you are online. You can restrict the photo to Everyone, My Contacts, My Contacts Except… or Nobody in Settings then Privacy, and your photo also appears inside your contacts' message notifications.
Why can I not see someone's About text?
Because the default limits it to their saved contacts. WhatsApp's defaults give the About text, statuses and last seen to contacts only, while the profile photo and online status go to any user. A blank About is the ordinary state of an account you are not saved in, rather than evidence of anything about the holder.
Why is somebody's last seen missing?
Several documented reasons, and you cannot tell which. They may have set last seen to My Contacts or Nobody, they may never have messaged or saved you, you may be blocked, or you may have hidden your own last seen — which reciprocally removes everybody else's from your view. Even Everyone excludes complete strangers.
Does turning off read receipts hide my status views?
Yes, and it works both ways. WhatsApp states that turning read receipts off means you cannot see read receipts from other users, and the same switch stops you seeing who viewed your status updates while hiding your own views from them. Group chats are exempt: receipts are always sent there regardless.
What does a verified badge on a WhatsApp business account mean?
That Meta has verified the account through a multi-step process, based on its activity across Meta products or on documents it supplied. Meta Verified is a paid monthly subscription that includes the badge. It is evidence that the account is who it claims to be, not evidence that the business behind it trades honestly.
Can people in a WhatsApp group see my phone number?
That depended on when you asked. WhatsApp's privacy article says a group member's number cannot be hidden; its 2026 usernames page says a username stands in for the number in group chats too, and the two have not been reconciled. The group privacy setting only governs who may add you to one, and it does not stop somebody sending you an invite link, which you can still choose to accept.
Does a DetectiveCheck phone lookup check WhatsApp?
No. The phone module reaches 8 sources: the line's validity, carrier and line type, account-existence checks against PayPal, Binance and Facebook, and a sweep for public mentions, plus PicPay, Pix and the area-code region for Brazilian numbers. The WhatsApp checks described here are ones you run yourself.
Is a job offer arriving on WhatsApp from an unknown number real?
Almost never when it arrives unsolicited, quotes a daily rate and describes no actual work. A profile photo and a friendly About line cost the sender nothing, and neither is verified by WhatsApp. What the number itself can and cannot settle is covered in our guide to spotting a scam phone number.
