Use TwinNumber with Whatnot.
Selling on Whatnot in the U.S.? Use a real U.S. mobile number for the code that verifies your seller account and the two-factor checks that protect it.
- What we tested
- Receiving SMS verification codes
- Line type
- Mobile
- Last tested
- Oct 22, 2026
We re-test Whatnot regularly and update this date.
What Whatnot uses your number for
- Every seller verifies a phone number with a one-time code, at sign-up or in the seller dashboard.
- Whatnot uses it for two-factor authentication and to recover your account after suspicious activity.
- It also lets Whatnot reach you quickly about account or order concerns.
Add your TwinNumber on Whatnot
- 01
Open your account
In the app or on whatnot.com, tap or click your Account icon (on the web, then Account Settings > Account).
- 02
Change the phone
Select Change Phone (app) or Change Phone Number (web) and enter the new number.
- 03
Verify it
Follow the steps to verify your account.
Why the line type matters
Marketplaces often check whether a number is mobile, landline or VoIP before sending a code, and many turn VoIP numbers away. TwinNumber numbers are registered as mobile.
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Where can I sell on Whatnot from?
You apply from the country you are located in, such as the U.S., Canada, the U.K., Australia or several EU countries. Your bank account must match: a U.S. seller account needs a U.S. bank account in USD.
Can buyers change their number in settings?
Not yet. Buyers ask support in the app through Account > Contact Us > Account > Update Account Information > Update Phone Number, and may be asked to verify their details.
What else does Whatnot verify for sellers?
Besides your phone, every seller verifies a payment method and a government-issued ID through Stripe or Persona. Account holders must be 18 or older; sellers aged 13 to 17 need a verified parent or guardian account.
Is TwinNumber affiliated with Whatnot?
No. We test our numbers with popular services and publish the results. Whatnot is a trademark of its owner.
What if a code doesn't arrive?
Request a new code, then check your inbox and notification settings. If it keeps failing, contact us and we'll look into it.
Ready for Whatnot codes?
Join the waitlist and be among the first to get your U.S. mobile number.