---
title: "One-time codes — DualLine"
description: "Use a temporary, receive-only number for one verification-code attempt. You do not own the number, and release or reuse timing is not promised."
canonical: "https://dualline.co/one-time-codes"
---

# Sometimes you need  one code, not a number.

Use a temporary, receive-only number for one verification-code attempt. If a code arrives, read it in the app. The number is not yours to keep, and provider release or reuse timing is not promised.

 [See code details](https://dualline.co/one-time-codes#how)

## How it works

1. ### Pick the service

  You choose which service the code is for. Numbers are matched to that service — a number that works for one may not work for another.
2. ### Use a temporary number

  It is supplied for a one-time code attempt and is not a number you own or keep.
3. ### Read the code in the app

  If a code arrives, you read it in the app. We do not promise when the provider releases or reuses the temporary number.

## This is not a DualLine line.

The two products solve different problems and it matters which one you pick. A line is an identity you keep. A one-time code is a disposable errand.

| — | One-time code | DualLine line |
| --- | --- | --- |
| The number stays yours | No | Yes |
| Receive more than one code | No | Yes |
| Send and receive messages | No | Yes |
| Dedicated recurring number | No | Yes |
| Recovery subject to terms | No | Yes |
| Costs | Varies by service and country; shown in the app before you pay | A monthly subscription |

## What we will not promise

These are temporary provider numbers, not numbers you own. Some services may reject them or find that a number was used before. If no code arrives, your credit is returned automatically, but we do not guarantee acceptance by WhatsApp, payment services or any other service. We also do not promise when a provider releases or reuses a number.

 [See DualLine lines](https://dualline.co/second-line)

## Choose the right WhatsApp option

A WhatsApp-specific code number, a mobile eSIM number and internet for an existing account serve different needs.

[### WhatsApp verification numbers in DualLine

Get a WhatsApp-specific OTP number in DualLine. Select the service and country, receive your registration code and understand temporary access.

 Read guide](https://dualline.co/one-time-codes/whatsapp) [### WhatsApp with eSIM: choose data or a new number

Keep WhatsApp connected with travel data, get a WhatsApp OTP number, or choose a mobile eSIM with SMS and calls. Understand which option fits.

 Read guide](https://dualline.co/guides/whatsapp-esim-and-numbers) [### eSIM plans with a phone number, calls and SMS

Compare mobile eSIM plans with data, a phone number, calls and SMS. Choose the incoming capabilities needed for WhatsApp registration.

 Read guide](https://dualline.co/esim/with-phone-number) [### Use WhatsApp abroad with a travel eSIM

Keep your existing WhatsApp number while using travel eSIM data. Set the data line, control roaming and prepare for later verification.

 Read guide](https://dualline.co/esim/guides/whatsapp-abroad)

## Answers for your situation

[Receive a verification code without sharing your everyday number.](https://dualline.co/guides/verification-without-personal-number)