A free US number for WhatsApp can get you through the first code, but it doesn’t keep the account safe, because someone else controls the number. WhatsApp sends a new code to the same number every time you move phones or log in again. The safe choice is a US number you keep. The TripoSIM US number receives WhatsApp codes, TripoSIM tested WhatsApp on October 13, 2026, and the number stays yours while your plan is active. Here is how each free option falls short, and how to set WhatsApp up on a number you keep.
What kinds of free US number do people try for WhatsApp?
There are three, and they fall short in different ways.
Public SMS inboxes
These websites show a list of US numbers and every text those numbers receive, on an open web page. No sign-up, no cost.
The problem is in the description: anyone can read your code. WhatsApp is clear about what a code means: “If someone is trying to take over your account, they need the SMS verification code sent to your phone number to do so” (help center). On a public inbox, that code is visible to every visitor.
It gets worse after you register. WhatsApp also says that after a number is registered, “anyone who might be using your account is automatically logged out” (help center). So anyone who later requests a code for the same number and reads it on the same page can register the account on their phone and push you out.
Free ad-supported apps
Free calling and texting apps give you a US number inside an app. You get a private inbox, which is better than a public page. The problem is that the number may not stay yours. If the app takes it back, for example after a period without use or when a free plan changes, it can be given to someone else. Burner’s own blog says that “secondary phone numbers are often recycled” and that “someone may have already set up a WhatsApp account” with a number you receive.
One-time code rentals
Rental marketplaces sell a US number for a single code, often for a few minutes or hours. They are cheap rather than free, but they belong in the same group because the number is not yours for long: one code, then the number moves to the next customer. For WhatsApp, that is the problem.
Why does the number need to stay yours?
The first code is the easy part. What matters is the next one.
You will need a code again. A new phone, a reinstall or a logout all ask for a fresh code on the same number. WhatsApp’s recovery page says: “It’s not possible to recover an account without a SIM card with the same phone number as your account.” If the free number has expired or gone to someone else, there is no way back.
Numbers get recycled. WhatsApp identifies a recycled number when an account is unused for 45 days and then reactivated on a new device, and it removes the old account data. The new holder of an old free number can start their own account on it.
Inactivity deletes the account. WhatsApp says “WhatsApp accounts are generally deleted after 120 days of inactivity” (help center). Open WhatsApp regularly, whatever number you use.
How do the free options compare with a number you keep?
| Option | Who can read your codes? | Do you keep the number? | Good for a WhatsApp account you keep? |
|---|---|---|---|
| Public SMS inbox | Anyone | No | No |
| Free app number | You | Only while the app lets you | No |
| One-code rental | You, briefly | No | No |
| TripoSIM US number | You, in the TripoSIM app | Yes, while your plan is active | Yes |
For a wider look at the trade-offs beyond WhatsApp, see free vs paid US numbers.
How do you set up WhatsApp on a US number you keep?
- Get the number. Pick a plan ($100 a year or $12.99 a month), complete the 2-minute ID check, and choose a number by state or area code.
- Register WhatsApp. Choose United States (+1), type the 10 digits, and keep the TripoSIM app open with internet on. The code arrives as a text in the TripoSIM app. If the timer runs out first, choose the phone call option.
- Protect the account. Turn on two-step verification and add a recovery email.
- Keep it yours. Keep the plan active and open WhatsApp regularly. If a plan ends, the number is held 30 days (yearly) or 90 days (monthly) before release.
You can also keep your own mobile number on your main WhatsApp and add the US number as a second account. See how to get a second WhatsApp number. Step-by-step help is in how to set up WhatsApp with a US number, and the full picture is on using a US number for WhatsApp.
Whatever number you use, follow WhatsApp’s responsible-use guidance: “Only send messages to those who have contacted you first or have requested you contact them on WhatsApp.”
Bottom line
A free US number for WhatsApp is a loan, not a number. It might pass the first code, but you can’t count on the next one, and that is the code that decides whether you keep the account. Use a US number you keep: the TripoSIM US number receives WhatsApp codes and stays yours while your plan is active.