Number Withholding Setup

DECT Phone

1. Temporarily Withholding your Number

You can withhold your number for a single call using the call code *31# then the number you want to call. Your caller ID will then be blocked for that call.

FRITZ!Fon M4 with code *31# entered to withhold number

Example - Enter *31#01706902000 to block your caller ID when calling the telephone number 01706 902 000.

2. Permanently Withholding your Number

If you want to permanently withhold your number for all calls you can do this by making a couple of quick changes within your FRITZ!Box Interface;

  • Start by finding the "FRITZ!Box Password" on the underside of your router

    Label on the back of FRITZ!Box detailing the wifi and log in details
  • Using one of your devices, open your web browser of choice and go to http://192.168.178.1 (when connected to your router via WiFi or a Wire)
  • You'll then be shown a log in screen with an empty "Password" field, enter the found password and click "Log In"

    FRITZ!Box Interface box asking for a password and an option to log in
  • Note: You can also find these steps on our "How To" YouTube Video

  • Click the "Telephony" Menu

    Telephony menu option, within FRITZ!Box User Interface
  • Now click the "Telephony Devices" sub-menu

    FRITZ!Box menu option for telephony devices
  • Find your telephone in the list and click the "Edit" button next to this

    Table of devices and numbers with edit symbols on the right of the images
  • On the next page select the "Telephony Device Features" tab

    Tab on FRITZ!Box interface worded device features
  • Enable the option "Calling line identification restriction (CLIR)"

    tickbox to enable CLIR in the FRITZ!Box Interface
  • Click "OK" to save the settings

    Note: You can temporarily display your number again by using the call code #31# before entering the number you wish to call.
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