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Knowledge document #142

Setting up call blocks for incoming and outgoing calls (e.g. premium-rate numbers)

You can set up call blocks in the FRITZ!Box to

  • block outgoing calls to specific telephone numbers or number ranges (for example premium-rate numbers). Telephones connected to the FRITZ!Box are then no longer able to call these numbers.
  • block incoming calls from specific telephone numbers or number ranges. You can also block all callers who are not entered in a FRITZ!Box telephone book or callers who do not transmit their telephone number (anonymous callers). Then the telephones connected to the FRITZ!Box do not react to incoming calls from these callers and the calls are not logged in the call list of the telephones. However, the calls are displayed as rejected calls in the FRITZ!Box call list.

Note:All instructions on configuration and settings given in this guide refer to the latest FRITZ!OS for the FRITZ!Box.

1 Blocking outgoing calls and defining exceptions

Blocking a telephone number or range of telephone numbers

  1. Click "Telephony" in the FRITZ!Box user interface.
  2. Click "Call Handling" in the "Telephony" menu.
  3. Click on the "Call Blocks" tab.
  4. In the section "Call Blocks for Outgoing Calls", click the button "Add Call Block".
  5. If you want to block a specific number, select "Telephone number" from the drop-down list and enter this number in the field "Number/Number Range".
    • If you want to block a specific number range, select one of the preconfigured ranges from the drop-down menu or select "Telephone number" and enter this number range in the field "Number/Number Range" (for example 0900 or 123).
  6. Enter a name for the call block. The name is then displayed in the call list of the FRITZ!Box.
  7. Click "Apply" to save the settings.

Configuring exceptions for blocked number ranges

If you blocked outgoing calls to a specific number range, you can use a dialing rule to configure exceptions for individual numbers or number ranges. Then you can call these numbers or number ranges despite the block:

  1. Click "Telephony" in the FRITZ!Box user interface.
  2. Click "Call Handling" in the "Telephony" menu.
  3. Click on the "Dialing Rules" tab.
  4. Click the "New Dialing Rule" button.
  5. Select the option "Telephone number" from the drop-down list "Number range".
  6. Enter the complete telephone number including area code or enter a number range you want to allow calls to.

    Example:
    You configured a block for international calls but still want to allow calls to be made to USA. Enter the country code for USA, "001", as the telephone number when configuring the dialing rule.
    You configured a block for the mobile telephone network but want to allow calls to your mobile telephone number. In this case, enter your complete telephone number when configuring the dialing rule.

  7. From the drop-down list "Connect via", select the kind of connection or the telephone number that should be used to call the number.
  8. Click "Apply" to save the settings.

2 Blocking incoming calls and defining exceptions

Anonymous calls

You can block callers who do not transmit their telephone number (anonymous callers). You can either block all anonymous callers or only anonymous callers who called a specific telephone number:

  1. Click "Telephony" in the FRITZ!Box user interface.
  2. Click "Call Handling" in the "Telephony" menu.
  3. Click on the "Call Blocks" tab.
  4. Click the "Add Range" button in the section "Block Ranges of Telephone Numbers".
  5. Select "Without telephone number (anonymous)" from the drop-down list "Number range".
  6. Select whether only calls to a specific number or all calls should be blocked.
  7. Click "Apply" to save the settings.

Calls from a specific telephone number or telephone number range

Note:As an alternative, you can also block telephone numbers directly from the FRITZ!Fon's call list.

  1. Click "Telephony" in the FRITZ!Box user interface.
  2. Click "Call Handling" in the "Telephony" menu.
  3. Click on the "Call Blocks" tab.
  4. If you want to block a specific telephone number:
    1. Click the "Add Telephone Number" button.
    2. Enter the telephone number and a name. The name is then displayed in the call list of the FRITZ!Box.

      Note:Alternatively, you can also block telephone numbers directly from the FRITZ!Box's call list by clicking the corresponding "Add to telephone book?" button.

    3. Click "Apply" to save the settings.
  5. If you want to block a telephone number range:
    1. Click the "Add Range" button.
    2. Select "Number range" from the drop-down list "Number range".
    3. Select whether only calls to a specific number or all calls should be blocked.
    4. Enter the desired range (for example 0900 or 123) in the "Number range" field.
    5. Enter a name for the call block. The name is displayed in the call list of the FRITZ!Box.
    6. Click "Apply" to save the settings.
  6. If you want to block a telephone book:
    1. Click the "Add Range" button.
    2. Select "Entire telephone book" from the drop-down list "Number range".
    3. Select whether only calls to a specific number or all calls should be blocked.
    4. From the drop-down list, select the telephone book that contains the telephone numbers and telephone number ranges you want to block. Ranges must end with a *.

      Example:
      If you want to use the telephone book to block the range "123", create a telephone book entry for the number 123*.

    5. Click "Apply" to save the settings.
  7. If you want to block all callers without a telephone book entry ("allowlist"):

    Note:In the telephone book you can also unblock number ranges. For example, if you do not want to block the area code "030", create a telephone book entry for the number 030*.

    1. Click the "Add Range" button.
    2. Select "not in telephone book" from the drop-down list "Number range".
    3. Select whether only calls to a specific number or all calls should be blocked.
    4. Click "Apply" to save the settings.

Setting up exceptions for specific callers

If you blocked incoming calls to a telephone number range, you can set up exceptions for specific callers in the telephone book. These callers can still call, despite the block:

  1. Click "Telephony" in the FRITZ!Box user interface.
  2. Click "Telephone Book" in the "Telephony" menu.
  3. Click the (Edit) button next to the entry for the caller.
  4. Enable the option "Important person". This option is only available in FRITZ!Box telephone books and Google Contacts.
  5. Click "Apply" to save the settings.
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