Search results for “how to hide my phone number when calling” almost always stop at the first option and call it done: dial *67 before the number. That works some of the time. The rest of the time, it does not. This is the longer version. When caller-ID blocking actually does what you think it does, when it silently fails, and what to use when you need to hide your number across both calls and SMS, not just one of them.
Why People Actually Hide Their Numbers in 2026
The reasons skew less paranoid than the marketing copy suggests.
- Selling something on a public listing. Returning the call to a potential buyer should not hand them your primary line.
- Online dating follow-ups. The conversation has moved to phone and you are not yet sure whether you want them holding your real number long term.
- Journalism and source protection. A reporter calling a sensitive source should not leave their personal number in the source’s call log.
- Domestic privacy. Some calls need to happen without leaving a paper trail in someone else’s phone.
- Routine business cold outreach. Sales teams have done this since before mobile phones existed.
The shared thread is control. The number you carry is the number that ends up in databases. Hiding it for a specific call is a tool worth knowing how to use properly.
Method 1: The Per-Call Code
The classic. Dial a short prefix before the number and your call shows up as “Unknown,” “Withheld,” or “Private.”
| Country | Prefix |
|---|---|
| United States, Canada | *67 |
| United Kingdom | 141 |
| France, Germany, Spain, Italy, most of Europe | #31# |
| Australia | 1831 |
| New Zealand | 0197 |
Where it works. Most regular mobile-to-mobile and mobile-to-landline calls go through with the number hidden.
Where it quietly does not:
- Toll-free numbers. 1-800 and 1-888 numbers in North America strip the block. The receiver sees your real number.
- Emergency services. 911, 999, 112, 122 all override caller-ID blocking by design. This is non-negotiable and worth knowing.
- Business lines with caller-ID-required policies. Some banks, healthcare providers, and recruiters reject calls from blocked numbers automatically. You hear ringing, they never see the call.
- SMS. The prefix is for voice. SMS sent from the same number still shows your real number.
The per-call prefix is best for one-off calls to consumer phones. It is not a complete privacy strategy.
Method 2: Phone Settings Toggle
Every modern phone has a permanent caller-ID toggle. On iPhone, it is under Settings, then Phone, then Show My Caller ID. On Android, the location varies but lives under the phone app’s settings.
Where it works. Same surface area as Method 1, but applied to every outgoing call by default.
Where it breaks. Some carriers, especially in the US and parts of the Gulf, override this setting at the network level. The toggle says “off,” but the network still passes your number along. You will not know it failed until someone tells you. SMS is also unaffected, just like with the prefix method.
This is Method 1 in disguise, with the same blind spots.
Method 3: A Separate Virtual Line
The first two methods hide your existing number for some calls. A separate virtual line is the only approach that covers both calls and SMS, and it does it by simply being a different number.
When you call using a virtual number purchased through the Numero app, the receiver usually sees that number on their screen — not “Unknown” or “Withheld.” It appears as a real working number that isn’t your personal one. However, if you choose to hide your caller ID through the app, the call can appear as “Unknown,” “Private Number,” or sometimes even display a different number instead.
The privacy logic shifts. Instead of hiding the number you carry, you carry two numbers and choose which one to expose for each situation. The primary stays clean. The virtual one absorbs everything that does not deserve permanence.
For situations where the number is truly throwaway (a one-off listing, a dating-app first call), the practical thinking is closer to a temporary line. The 2026 privacy guide to temporary numbers covers that frame in detail. For the conceptual distinction between a burner-app number, a disposable virtual line, and a long-term second number, the comparison piece on disposable numbers versus burner apps goes deeper.
Why Numero Is the Cleanest Option Here
Numero gives you a real virtual phone number from 80+ countries, working through the app over VoIP. Three things matter for hiding-your-number use cases:
- The number is yours alone while the plan is active. Nobody else is reading your inbox.
- It covers both calls and SMS. Texts from the Numero number show the Numero number as the sender.
- There is a built-in “Hide My Number” feature in the app itself. On outgoing calls from your Numero line, you can flip on per-call privacy that displays “Unknown Number” or a different number to the receiver. This is the in-app equivalent of Method 1, layered on top of an already-not-your-primary line.
That last layer is what most articles miss. You can have a virtual number and still hide it on a specific call. Two levels of privacy, one app.
Three Taps to Set It Up
- Install the Numero app from Google Play or the App Store, or sign up on numeroesim.com. Register with your real phone number.
- Open Phone Numbers, pick Mobile Numbers, and choose the country. Mobile or social media numbers both work, depending on whether you also need WhatsApp activation later.
- Purchase a plan. Monthly works for trial use. The number is live in the app immediately.
For outgoing calls from this line, the privacy toggle is in the dial screen.
FAQ
Does 67 cover SMS too?
No. *67 is for voice only. SMS sent from the same number still shows your real number. If you need both, a separate virtual line is the only real fix.
Will 67 hide my number when calling a landline?
Usually yes, but the landline’s caller-ID display depends on the receiving service. Older landlines with no caller-ID at all still show whatever the network passes, including your blocked number on some legacy systems.
Will the receiver still see my name?
Caller-ID blocking hides the number and, on most networks, the name (CNAM in the US). A small number of carriers cache the name separately and may still display it. If the recipient has saved you in their contacts, they see whatever name they assigned, regardless of blocking.
Can I hide my number for some calls and not others, on the same line?
With *67 or the equivalent prefix, yes, per call. With the phone-settings toggle, it is all or nothing until you flip it back. With a Numero virtual number, the per-call toggle inside the app does exactly this, cleanly.
Is it legal to hide my caller ID?
In most countries, yes, for personal and business use. It is illegal when used to facilitate fraud, harassment, or impersonation, regardless of the method. Use common sense.
The Practical Wrap
If you are hiding your number once a year, *67 is fine. If you are hiding it for one specific category of calls (sales, marketplace returns, dating follow-ups), a separate virtual line is the more durable answer. It covers SMS, it does not break on toll-free numbers, and the receiver sees a working number instead of a blocked one (which some recipients reject by reflex).
If a second line you control would solve a specific call you are already trying to avoid making, a Numero virtual number takes about a minute to set up.
