Use TwinNumber with GitHub.
Setting up or securing your own GitHub account? Use a real U.S. mobile number for sign-up checks and two-step verification codes, and read them in your browser.
- What we tested
- Receiving SMS verification codes
- Line type
- Mobile
- Last tested
- Oct 12, 2026
We re-test GitHub regularly and update this date.
What GitHub uses your number for
- Two-factor authentication codes by text message, if you choose SMS as a 2FA method.
- Nothing else: GitHub only needs your number when you use SMS for 2FA.
- SMS 2FA works in supported countries only, and isn't accepted on the sudo prompt.
Add your TwinNumber on GitHub
- 01
Open Password and authentication
Click your profile picture, then Settings, and in the Access section click Password and authentication.
- 02
Edit the SMS method
Under Two-factor methods, click Edit next to SMS and complete the CAPTCHA.
- 03
Verify the new number
Select your country code, enter the number, click Send authentication code and type the code.
- 04
Save the change
Click Continue, then Save; the new number only applies once it's verified and saved.
Why the line type matters
AI and developer platforms 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 →
ChatGPT
Claude
Perplexity
AWSQuestions
Should I use SMS or an authenticator app for GitHub 2FA?
GitHub strongly recommends a TOTP app over SMS, with a passkey or security key as a backup. SMS still works as a method in supported countries.
Why does GitHub ask for my password instead of an SMS code for sensitive actions?
Text messages aren't accepted on the sudo prompt, so if SMS is your only 2FA method, GitHub asks for your password there instead.
My organization blocks members who use SMS 2FA. What do I do?
Some organizations and enterprises don't allow SMS 2FA; switch to a TOTP app and turn off SMS to regain access to their content.
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 GitHub?
No. We test our numbers with popular services and publish the results. GitHub 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 GitHub codes?
Join the waitlist and be among the first to get your U.S. mobile number.