# Caller ID Spoofing in Germany: Fake Numbers on Your Screen

> Caller ID spoofing means a caller makes your phone display a number that is not theirs. Since December 2022 German networks must drop calls showing 110, 112 or premium numbers and hide German numbers on calls arriving from abroad. Spoofing still happens, so never trust a displayed number alone. Hang up and call back on a number you looked up yourself.

- URL: https://nummernindex.de/en/spam-and-fraud/caller-id-spoofing-germany/
- Language: en
- Updated: 2026-10-19
- Publisher: Nummernindex (OnlineBuilders LLC, https://onlinebuilders.biz)

Your phone shows the name of your bank, the number of your local Bürgeramt, or even your own number. None of that proves anything. The number on your screen is information the caller sends along, not an ID card. Germany's telecoms regulator, the Bundesnetzagentur, puts it bluntly: caller numbers can be faked and are not fully trustworthy.

## What caller ID spoofing is

With spoofing, the caller replaces their own number with another one. According to the regulator, they do not need to buy or activate that number. Entering it as the sender is enough. Spoofed numbers can be real ones, including foreign numbers whose owners have nothing to do with the call, or made-up numbers that were never assigned.

The motives range, in the regulator's words, from prank calls to criminal schemes. German police prevention pages describe how fraudsters posing as police officers deliberately display a number with the victim's own area code. If you see a familiar local prefix, you are more likely to answer.

Legally it is clear-cut. [Section 120 of the Telecommunications Act](https://www.gesetze-im-internet.de/tkg_2021/__120.html) requires that the caller number transmitted is one assigned to the caller, and extra numbers may only be added by someone with the right to use them. Spoofing has been banned for years. The difficulty has been enforcement, because a ban means little to someone calling from another country through a chain of networks that German authorities cannot reach.

## Hidden versus spoofed: not the same thing

Calls without a number are not spoofing. Hiding your number is legal in Germany. Under section 15 of the TDDDG, Germany's telecoms privacy law, anyone may suppress their number permanently or per call, and you have the right to reject such calls just as easily. Behind a hidden number there may simply be a doctor's surgery or a private person who values privacy.

There is one exception. Marketing calls may not hide the number; the caller must transmit the real, assigned number. The regulator can fine breaches up to €300,000.

Spoofing is the opposite. You do see a number. It is just wrong. That makes it more dangerous than an anonymous call, because a familiar number builds trust while "unknown" makes people cautious.

## What German networks have blocked since 1 December 2022

Since that date, every network involved in a call has to apply two safeguards.

**What German networks must do since December 2022**

| | What happens | Legal basis |
|---|---|---|
| 110 or 112 shown as caller | call is cut off | s. 120(3) |
| 0900, 0137, 118xy, short codes as caller | call is cut off | s. 120(3) |
| German number on a call from a foreign network | number display is suppressed | s. 120(4) |
| German mobile number while roaming | number still shown | exception in s. 120(4) |
| Foreign number on a call from abroad | shown normally | not covered |

Source: Section 120(3) and (4) TKG; Bundesnetzagentur, number manipulation

The second safeguard is the important one. According to the regulator, many spoofed calls originated abroad or were routed through foreign networks. Now such calls show "unknown" or "anonymous" instead of a German number. The regulator warned at the time that people would see more calls without a number. Not all of them are dubious, but a scammer abroad can no longer hide behind your local area code.

On 110 the regulator is unequivocal. No call can legitimately display the emergency number, because calls cannot be made from it at all. Police stations call from their normal local numbers.

## The gaps that remain

Spoofing has become rarer. It has not gone away. Three gaps are worth knowing.

First, the rule for foreign calls does nothing about calls that start inside German networks. Anyone there who sets a number they do not own is breaking the law but is not automatically stopped, and the regulator still receives complaints about manipulated numbers.

Second, only German numbers are protected. Calls from abroad showing a fake foreign number go through normally. Foreign numbers are outside German number administration, and the regulator says pursuing perpetrators abroad is rarely successful.

Third, the roaming exception. German mobile numbers may still be displayed from abroad so that real travellers remain reachable.

There is a fourth gap that matters if you have left Germany or split your time between countries: the German rules only apply to calls entering German networks. If you live in the UK, Spain or the US and your phone shows a German number, nothing in German law has filtered that call. Treat it with the same caution as any unexpected call.

The practical rule follows from all of this. Do not trust the number, trust the route. If someone claims to be your bank or the police, hang up and call them yourself on a number from your card, their website or your own records. For the German police, simply dial 110.

## If your own number is being spoofed

One typical sign: strangers call to say you just rang them. The regulator describes exactly this pattern. If your real number is set as the sender in a marketing campaign that uses an auto-dialler, every callback lands on your phone. Even if the fake number was padded with extra digits, callbacks still reach you, because the network simply drops the surplus digits.

What to do:

1. For each callback, write down the time and the number of the person calling you back. Without those details there is nothing to investigate.
2. Screenshot your router's call log if you have a landline. It sometimes shows clues to the number actually used.
3. Report the case straight away using the regulator's special form for number manipulation. According to the regulator, traffic data is usually deleted after seven days.
4. If the calls look criminal, contact the police as well.

Since 1 December 2021, the regulator can demand that the networks involved reveal which number a call really came from (section 123(3) of the Act). It prioritises cases by their chance of success. If no connection was made because nobody answered, networks usually store no data at all, and there is nothing left to find. Our guide to [reporting scam calls in Germany](https://nummernindex.de/en/blocking-and-reporting/report-scam-calls-germany/) walks through the forms step by step.

## Red flags for spoofed calls

There is no certainty, but some combinations should make you suspicious:

- an emergency or government number on screen, combined with time pressure
- your own number, or a relative's, shown as the caller
- a "bank" asking for a TAN or login details over the phone
- a caller insisting you stay on the line and not call anyone else

Our [number checker](https://nummernindex.de/en/number-checker/) tells you whether a number belongs to a local area, a mobile network or a special range. It cannot confirm who is calling. Nobody can do that from the number alone. Calls from fake police officers are a common use of spoofing; our guide to the [fake police call scam](https://nummernindex.de/en/spam-and-fraud/fake-police-call-scam/) covers that pattern in detail.

For businesses, spoofing hurts twice: customers are defrauded in the company's name, and the real hotline is flooded with angry callbacks. Telephony deserves a place in any [cyber security](https://onlinebuilders.biz/solutions/cyber-security) plan.

One small step pays off here: save the genuine service numbers of your bank, your health insurer and your employer in your contacts. Then, when a suspicious call comes in, you have a trustworthy number to call back on instead of relying on the call log.

## FAQ

### Can German police call me from 110?

No. Calls cannot be made from the emergency number 110, and police stations call from ordinary local numbers. Since December 2022 networks must cut off calls that display 110 as caller ID.

### Someone says I called them but I didn't. What happened?

Your number was probably spoofed, for example in a robocall campaign. Nobody needs access to your line for that. Note the details of each callback and report it to the Bundesnetzagentur quickly.

### I live outside Germany and got a call from a German number. Is it real?

Possibly not. The German blocking rules only work inside German networks. A call to a phone abroad that shows a German number can be spoofed, so verify through a number you already know.

### Is spoofing illegal in Germany?

Yes. Section 120 of the Telecommunications Act only allows callers to transmit numbers they have the right to use. Fraud committed with a spoofed number is also a criminal matter for the police.

Photo: Ismael Olea, CC BY 4.0 (https://commons.wikimedia.org/wiki/File:Telephone_switchboard_01.jpg)