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What can you do to prevent undesired calls?

First a little info

Anyone can receive fraudulent calls once in a while. Many BASE customers have notified unwanted calls from an international number that appear to be fraudulent. BASE has immediately blocked the numbers used as part of this IT fraud. In addition, we have taken every possible measure to avoid any subsequent damage.Anyone can receive fraudulent calls once in a while. Many BASE customers have notified unwanted calls from an international number that appear to be fraudulent. BASE has immediately blocked the numbers used as part of this IT fraud. In addition, we have taken every possible measure to avoid any subsequent damage.

What can you do?

Do you receive undesired calls (stalking, threatening calls etc.)? Then file a complaint with the police. Did you file a complaint with the police, and do you have questions about the investigation? Then ask them. BASE is not allowed to provide any information directly.

Here is some advice to help you recognize suspicious calls and avoid traps:

  • The best way to protect yourself against these calls remains: do not pick up or return the call!
  • Do not return calls to unknown foreign numbers. Numbers starting with +870, +871, +872, +873, +874, +881, +882 connect you to a satellite and are subject to higher charges.

Good to know: Do you not want to receive commercial calls ? Then register to be included in the don't-call-me-anymore list by calling 02 882 19 75.

  • Find a name or number

If the caller is listed in the Witte Gids (telephone directory), you can request the name or number by calling 1207.

  • Ombudsman's Office for Telecommunication

Do you know the number, but you aren't exactly sure who is behind the undesired calls? Then you can submit a complaint to the Ombudsman's Office for Telecommunication. They will then look up the caller's details for you. It is a good idea if you then also contact the police.

Note: Were you called from an international number or from a pre-paid card number? Then they can't trace the details for you.

Block the calls

You can block the calls yourself. Check below how you can block the calls.

Blocking calls

  • Open the Telephone app.
  • Press the menu button.
  • Select Call settings.
  • Select Refuse call.
  • Select List for automatic refusal.
  • Press the plus sign.
  • Enter the telephone number or select it from your contact or calls list.
  • Select Save. The number will now be automatically forwarded to your voicemail.


Unblocking calls

  • Open the Telephone app.
  • Press the menu button.
  • Select Call settings.
  • Select Refuse call.
  • Select List for automatic refusal.

Untick the contact.

Blocking messages

  • Open the Messages app.
  • Press the menu button.
  • Select settings.
  • Select Add to spam numbers.
  • Press the plus sign.
  • Enter the telephone number or select it from your contact or log file. 
  • Select Save.

Unblocking messages

  • Open the Messages app.
  • Press the menu button.
  • Select settings.
  • Select Add to spam numbers.
  • Long press the contact.
  • Select Delete on the new screen.
  • Confirm with OK.

Blocking messages or calls

  • Open the Telephone, FaceTime, Contacts or Messages app.

    • Telephone, FaceTime, Contacts: use the i-symbol to block contacts and numbers.
    • Messages: click Details and then the i-symbol.
  • Select Block this caller
  • Tap Block contact

Unblocking messages or calls

  • Go to Settings
  • Select Telephone, FaceTime or Messages
  • Select Blocked
  • Select Change
  • Delete the contact or telephone number.