How to Hide Your Number to Protect Your Privacy?

The numbers speak for themselves: with 73% of UK internet users facing scams in 2025 and over 210,000 cases of identity theft annually, handing out your real phone number left, right and centre has become risky. Sometimes, you just need to send an anonymous SMS to protect yourself or test a service. Not to commit fraud, but to keep control of your data.

Here, I'll explain exactly how to do it, with methods that actually work and a comparison table to help you see things clearly.

The #31# myth: why hiding your number natively doesn't work for SMS

We've all thought it at some point: dialling #31# before the recipient's number to send an SMS with a hidden number. It's a very common mistake.

In reality, the #31# code is a network instruction that was designed solely for voice calls (the GSM protocol). SMS messages, on the other hand, are transmitted via different protocols (SS7 or IP), whose technical architecture requires the sender's ID to be transmitted systematically.

In short, if you type #31# before an SMS, your message will be sent, but your number will be clearly displayed on the recipient's screen. Let's look at the real solutions instead.

The 4 ways to send an SMS without revealing your identity

Method 1 — Use an anonymous SMS web service

This is the easy option. Many online platforms allow you to send a free anonymous SMS directly from your browser. You type in the number, your text, and the message is sent via a generic number. There's nothing to install.

However, you need to be aware of the downsides:

• Often limited destinations: many of these sites only cover North America.
• One-way communication: the recipient receives the message, but they usually can't reply to it.
• A poor user experience: expect interfaces cluttered with ad banners.
• Personal data concerns: your IP address is always logged, and some free sites monetise your browsing data.

In short, it's a method that comes in handy for an immediate, one-off need. For more regular or secure use, you're better off trying the following methods.

Method 2 — Get a disposable phone number

A disposable phone number is the modern equivalent of a pay-as-you-go SIM card. It's a temporary number (active for a few minutes or a few days) that is not linked to any of your identity documents.

This is particularly useful in several situations:

• Verify a new account (social media, e-commerce) without providing your personal number.
• Communicate with a stranger from a classified ad (e.g., Gumtree, Vinted) while maintaining a safe distance.
• Test an app that requires an SMS verification code.

The use of these numbers has become so widespread that some VPN providers now include disposable number generators in their packages. Technically, these numbers are based on Cloud and VoIP technology, which makes them highly responsive.

A few things to keep in mind:

• It's perfect for one-off use (like receiving a PIN code).
• They have a short lifespan, so don't use this number for important contacts.
• Some systems have become stricter: many banks and government agencies now detect and block the use of VoIP numbers.

Method 3 — Use a Virtual Number (VoIP)

Now we're taking it up a gear. A virtual number for SMS is a real second phone number, stable over time and managed through an app on your smartphone.

To understand the difference:

• A disposable number is designed to be used once and then discarded.
• A virtual number is designed to last, allowing you to separate your professional and personal lives or maintain a separate digital identity.

The main advantage is that you can both send AND receive SMS messages anonymously (from the recipient's point of view). Well-known apps like Onoff, Burner and Google Voice dominate this market. Here's what you need to know if you're in the UK:

This is the most suitable option if you're looking to send texts from another number on a regular basis.

Method 4 — Secure messaging apps with a disposable number

This is the privacy purist's approach. The idea is to combine the anonymity of a number with robust encryption. You get a disposable number and use it solely to create an account on Signal or Telegram.

Why it's effective:

• End-to-end encryption: the content of your messages is mathematically unreadable to anyone, including the app developer.
• Disappearing messages: you can set (especially on Signal) your conversations to self-destruct after being read.

This method requires a bit more setup, but it offers top-tier digital security without exposing your personal number to your contacts.

Comparison table — Which solution should you choose for your needs?

To put it simply: if you just want to send a quick message, a free web service will do the trick. If you need a proper two-way conversation, you'll have to turn to a virtual number or a dedicated solution like SmsJuice.

Our solution: send an anonymous SMS to France in under 2 minutes

Given the limitations of existing tools, we have designed an approach that prioritises ease of use, without compromising on privacy.

It works in 4 simple steps:

1. Customise the sender: choose a name or nickname, or simply leave the field blank.
2. Type your message.
3. Enter the recipient's number.
4. Confirm and send — all without having to create an account or provide any personal information.

Here's what sets our tool apart:

• The interface is clean, with no intrusive ads.
• We do not sell your browsing data.
• Routing is optimised for all French networks.
• The tool is strictly GDPR compliant.
• Receiving replies is possible, as we use our own virtual number infrastructure.

We wanted to create a trustworthy alternative in this market. You can use our service for a free and anonymous SMS (or via our freemium options), safe in the knowledge that your data is not the product.

It's a tool designed to send an anonymous SMS to France, within a legal framework that respects your privacy.

Try SmsJuice — send anonymous SMS with no sign-up

What the law says: anonymity, legal limits and responsibilities

Let's be clear: total anonymity doesn't exist on the internet when it comes to the law. Sending platforms are legally obliged to store IP addresses and connection logs. In the event of a court order (during a criminal investigation), this information is handed over to the authorities.

Identity protection is a serious matter. With a recent 700% increase in identity theft in France, wanting to remain anonymous is a perfectly legitimate right. But this right must not be used as a shield for abuse.

What is perfectly legal:

• Protecting your privacy when communicating with a stranger (e.g. on classified sites, dating apps).
• Testing the reliability of an online service without giving out your real number.
• Playing a harmless joke on someone you know.
• Discreetly sounding out a former employer or partner.

What is strictly illegal (and punishable by law):

• Harassment, whether psychological or sexual (Article 222-33-2-2 of the Penal Code).
• Threats, insults and intimidation (Articles 222-17 and onwards).
• Fraud and phishing attempts (Article 313-1).

Conclusion — Protect your privacy today

Keeping control of your privacy and digital security has become essential. If you need to communicate without revealing your identity, try SmsJuice to send a free anonymous SMS in France, easily and with no registration required.