OTP verification numbers for one-time SMS codes
Need a number just to receive one verification code? Rent a temporary SMS verification number, enter it in the app or website, and the OTP code appears on your screen when it arrives.
Get StartedOTP numbers are in beta and currently open to pilot accounts. Business numbers are available to everyone.
Delivered and managed by Inbox Number: one account, one bill, one support team.
How an OTP number works
- 01Pick a country (US, Canada or UK) and the service you're verifying.
- 02See the price and get a number. The price is charged to your Inbox Number balance.
- 03Enter the number in the service. The code appears on your Inbox Number page, ready to copy.
- 04No code? Cancel and the price goes back to your balance.
When a one-time number makes sense
- Verifying an account you own that asks for a phone number once
- Testing a sign-up flow with a real SMS code
- Keeping your personal number off a site you rarely use
Two ways to receive SMS online
Business number (monthly or yearly)
A private US, Canadian, UK or Australian number that stays yours. Codes and customer texts arrive in your inbox.
One-time OTP number
A temporary US, Canadian or UK number for a single verification code. If no code arrives, cancel and the price goes back to your balance.
Acceptable use
- Only for verifying accounts you own
- No bulk or automated account creation
- Some services refuse virtual numbers
- No refund once a code has been received
Frequently asked questions
What is an OTP verification number?
A temporary phone number you rent for a short time to receive a one-time passcode by SMS when you sign up or log in to a service.
How much does it cost?
Each service shows its price before you buy. It's paid from your Inbox Number balance.
What if no code arrives?
Cancel the number while no code has been received and the full price goes back to your balance. Once a code is received the order is complete and can't be refunded.
Which countries are available?
The United States, Canada and the United Kingdom.
Can I keep the number?
No, an OTP number is for one code. If you need a number that stays yours, get a business number with a private inbox.