Australian phone number search

Who is behind this WhatsApp number?

By the StoryCheck team · 7 min read · Published 29 September 2026

WhatsApp never tells you who owns a number. It only shows what the account holder has chosen to share, usually a profile photo, a name they typed themselves and an About line, each controlled by their own privacy settings. To work out who is behind a WhatsApp number in Australia, read the country code, look at the profile without replying, reverse search the photo, then run a private reverse lookup for the line type, a possible name, linked public profiles and scam signals.

What does WhatsApp show you about an unknown number?

Less than it seems. Every piece of profile information on WhatsApp is set by the person behind the account, and most of it can be hidden. The profile photo, the About line and last seen each have their own privacy setting, with the options 'Everyone', 'My contacts', 'My contacts except' and 'Nobody'. If a stranger's photo is set to 'My contacts', you simply see no photo, which says nothing either way about whether they are genuine.

How do you check a WhatsApp number without replying?

1. 1

   Read the country code

   An Australian mobile appears on WhatsApp as +61 4, the international form of an 04 number, and any code other than +61 means the number was issued overseas. In StoryCheck lookup data from July to September 2026, 98% of the numbers people in Australia checked were Australian. Of the foreign ones, +1 (the US or Canada) made up 27%, +64 (New Zealand) 18%, +44 (the UK) 6% and +63 (the Philippines) 5%. The guide to Australian prefixes covers the rest.

2. 2

   Open the chat without saving the number

   WhatsApp's click to chat link opens a chat with any WhatsApp number. Type wa.me/ into your phone's browser, followed by the number in full international format without the plus sign, spaces or the leading zero, so a mobile such as 0491 570 156 becomes wa.me/61491570156. Look at the photo and the name, but do not type or send anything.

3. 3

   Reverse search the photo

   Screenshot the profile photo and run it through Google Lens or TinEye, as eSafety suggests. A photo that turns up under a different name is the clearest single sign of a fake account. The StoryCheck photo search looks for the same photo and edited copies inside your report, without facial recognition.

4. 4

   Search the number itself

   Put the number in quotes in a search engine, in both formats: "0491 570 156" and "+61 491 570 156". Tradies, small businesses and sole traders often publish the number they use for WhatsApp, and numbers used in scams sometimes turn up in complaint threads.

5. 5

   Run a reverse lookup

   A reverse lookup checks the number against licensed telephony data and open sources in about 60 seconds, including whether it is active on WhatsApp and the operator and region where known. The person is never notified, and the next section shows what it adds.

What does a lookup add that WhatsApp cannot?

A 'daughter' whose new number is a VoIP line with no history, or a 'recruiter' whose number links to nothing, is a finding in itself. A possible name is often found for Australian mobiles but never guaranteed, and the confidence level beside it is the part worth reading.

Which WhatsApp scams target Australians?

• Hi Mum messages. A 'new number' claims to be your child. When the ACCC warned about this scam in August 2022, it said victims were contacted most often through WhatsApp, and more than 1,150 Australians had lost $2.6 million in seven months. The Hi Mum scam guide has the ten-second check that ends it.
• Job and task offers. A 'recruiter' offers paid work rating products, then asks for a deposit to unlock your earnings. Job scam losses reported to Scamwatch rose from $13.7 million in 2024 to $24.8 million in 2025. See job offer scams.
• A match who moves you off the dating app. Scamwatch lists a quick move to a free messaging app as a romance scam warning sign. Is this person real? covers the checks.
• Group invites from strangers. ASIC has warned that Australians are being added, without asking, to 'share trading' and 'stock tips' groups on messaging apps, then steered to fake trading platforms. Since August 2025, WhatsApp shows a safety overview when someone not in your contacts adds you to a group, so you can leave before reading a word.
• Requests for your verification code. A contact asks you to forward a six-digit code 'sent by mistake'. That code lets someone take over your account, and Scamwatch's rule is simple: never share verification codes.

The scale behind these is industrial: WhatsApp says it banned more than 6.8 million accounts linked to scam centres in the first half of 2025 alone.

How do you stop and report an unknown WhatsApp number?

• Silence unknown callers: go to Settings, then Privacy, then Calls. Calls from numbers you have not saved stop ringing but still appear in your call list.
• Limit who can add you to groups, as ASIC recommends: go to Settings, then Privacy, then Groups, and choose My contacts.
• Block and report: open the chat, tap the name or number at the top, then choose Block or Report.
• Report the scam to Scamwatch, run by the National Anti-Scam Centre. If you have sent money, ring your bank first. If you shared identity details, IDCARE offers free help on 1800 595 160.

What changes when WhatsApp usernames arrive?

In June 2026 WhatsApp opened username reservations and said usernames would launch later in the year. Once they do, a stranger with a username can message you without showing their number. Every WhatsApp account still needs a phone number, but if all you have is a username, there is nothing to look up, so treat it as you would an unknown number: check the photo, and never send money or codes to anyone you have not verified.