Decision guide
Permanent number or OTP number: which do you need?
Both receive verification SMS. The difference is how long the number keeps working for you.
Written and maintained by the VNumbr team · Last updated 24 September 2026
Key points
- Will this account ever ask for a code again?
- You need a single code for a one-off registration, are testing a service, or the account holds nothing of value.
- The account matters, uses SMS for two-factor authentication, or needs recovery.
- Both live in the same account and wallet, so use an OTP number for throwaway sign-ups and permanent numbers for the accounts you keep.
The one question that decides it
Will this account ever ask for a code again? If yes, choose a permanent number. If you are certain it will not, an OTP number is enough.
Two-factor authentication, password resets, new-device sign-ins and re-installs all ask again, often months later.
Choose an OTP number when
You need a single code for a one-off registration, are testing a service, or the account holds nothing of value. It is billed per activation and refunded in full if you cancel before an SMS arrives.
It is released after use, so it will not receive later codes.
Choose a permanent number when
The account matters, uses SMS for two-factor authentication, or needs recovery. A VNumbr permanent number stays assigned to you while you renew, with unlimited incoming SMS in a private inbox.
Turn on auto-renew from your wallet so it never lapses.
You can use both
Both live in the same account and wallet, so use an OTP number for throwaway sign-ups and permanent numbers for the accounts you keep.
Real-world examples
A one-off free-trial signup you will not revisit suits an OTP number. A WhatsApp, banking or exchange account suits a permanent number, because each will ask for another code at some point.
A marketplace listing you will close in a week suits OTP. A shop's seller account suits permanent.
What if you choose wrong?
Buying an OTP number for an account you later need is the costly mistake. You can add a permanent number in the account's settings afterward, as long as you still have access.
Buying a permanent number for a throwaway account only costs a little extra, and you can stop renewing at any time.
Permanent vs OTP number
| OTP number | Permanent number | |
|---|---|---|
| Billing | Per activation | Monthly or yearly |
| Codes received | One | Unlimited |
| Lasts | Minutes | While you renew |
| Refund | Full if cancelled before SMS | See refund policy |
| Best for | One-off sign-up | 2FA and recovery |
How VNumbr works
Choose a country
Pick where the number should be based. The prefix tells apps where you are.
Pay in crypto or wallet
Cryptomus, NOWPayments or your balance. Email-only signup, no ID.
Use it for verification
Enter the number where the app asks and request the SMS code.
Read it in your inbox
Messages appear in your dashboard in real time and through the API.
Common questions
Which is cheaper?
OTP for one code; permanent for repeated codes on one account.
Can I switch later?
Yes, buy the other type from the same wallet at any time.
Will both work with WhatsApp?
An OTP number can register, but only a permanent number reliably receives later re-verification codes.
Are both real carrier numbers?
Yes, both are sourced from real mobile networks.
Are VNumbr numbers real mobile numbers?
Yes. They are allocated on real mobile carrier networks rather than internet-based VoIP pools. Each app decides for itself which numbers it accepts, so no provider can guarantee a specific result.
How do I pay, and do I need ID?
Pay with cryptocurrency through Cryptomus or NOWPayments, or from a wallet balance. Signup needs only an email address and no identity documents.
What is the difference between a permanent number and an OTP number?
A permanent number is billed monthly or yearly and stays assigned to you for as long as you renew it. An OTP number is billed per activation and receives a single code before it is released.
Only need one code, not a number to keep?
This guide is about VNumbr's permanent numbers. For a single sign-up instead, VNumbr also sells OTP numbers billed per activation.
Get a number you keep
Pick a country, pay in crypto or from your balance, and receive SMS on a permanent line.