Use TwinNumber with Brex.
Setting up Brex accounts and cards for your U.S. company from abroad? Use a real U.S. mobile number for sign-up and the verification codes that follow.
- What we tested
- Receiving SMS verification codes
- Line type
- Mobile
- Last tested
- Oct 12, 2026
We re-test Brex regularly and update this date.
What Brex uses your number for
- Brex can send your two-factor code by SMS, though it recommends an authenticator app.
- Your number receives SMS notifications and is used for receipt matching.
- Brex Support uses it to verify your identity when you contact them.
Add your TwinNumber on Brex
- 01
Open Personal settings
Click your name at the top left of the dashboard and select Personal settings.
- 02
Update the number
Click Update next to Phone number and enter the new one.
- 03
Reset SMS 2FA
If SMS is your two-factor method, reset it so codes go to the new number.
Why the line type matters
Financial services 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.
Why banks reject Google Voice →
Mercury
Wise
Relay
PayoneerQuestions
Can I use a VoIP number on Brex?
No. Brex accepts a domestic or international number but not a VoIP one. TwinNumber numbers are registered as mobile, not VoIP.
Can I have two phone numbers on one Brex user?
No. Each Brex user can have only one phone number on their account.
Will Brex call me and ask for my 2FA code?
No. Brex says it will never call you to ask for your two-factor code.
Do I need to live in the U.S.?
No. TwinNumber works from 150+ countries with just a browser and an internet connection.
Is TwinNumber affiliated with Brex?
No. We test our numbers with popular services and publish the results. Brex 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 Brex codes?
Join the waitlist and be among the first to get your U.S. mobile number.