Spoofed Phone Calls are frustrating

If people report that they have been called from your number, even though you have not called them, you may be the victim of spoofing. Spoofing is a type of fraud where foreign fraudsters change the display of their number to a random Danish number. This makes it appear as if the call is coming from Denmark, even though it is actually coming from abroad. The scammers do not take over your number, but simply use it to hide their own.

Why do fraudsters use spoofing?
Foreign fraudsters use spoofing to get Danes to answer their calls and provide personal information such as credit card information. The fraudsters know that many do not answer calls from foreign numbers, and therefore they make it look like they are calling from a Danish number. They often claim they can offer a necessary service, but they need your payment information first.

What should you do if you are a victim of spoofing?
First, avoid giving out personal information over the phone unless you initiated the call yourself. To protect yourself from spoofing, you can refrain from answering calls from unknown numbers. If people need to get in touch with you, they will usually leave a message or call you back.

If your number is used for spoofing
Unfortunately, your mobile operator cannot block your number, as this would prevent you from using your phone and receiving desired calls. However, experience shows that the fraudsters typically use a random number for spoofing for 1-2 weeks before switching to a new number. It can be very annoying during that period as you will receive many calls from people who have been called by the scammers.

https://www.dr.dk/nyheder/indland/pas-paa-spoof-opkald-udenlandske-svindlere-laaner-i-stigende-grad-danske-numre-til