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Fritzbox: Create blacklist against spam calls


Spam and unsolicited advertising calls are a constant nuisance. If you are telephoning via your internet router, for example a Fritzbox, you can block the caller in future by blocking his phone number.

Since Fritz OS, a call block for a received call can be set up directly under “Telephony – Calls”. To do this, click on the phone book symbol in the line of the phone number entry and in the following menu on “Call barring”.

However, this way you can only put a stop to spam callers afterwards. If, on the other hand, you store a prefabricated telephone book with the numbers of possible advertising callers in the Fritzbox, you save yourself the entry of individual numbers. This is what Tellows’ score lists do, for example. They are based on the entries on the tellows.de website: There, users can enter numbers under which annoying calls are received, comment on them and rate them as serious or dubious. Depending on the number and rating, the telephone number receives a Tellows Score – depending on how high it is, the users have assessed the call as dubious. The Tellows score lists contain all phone numbers rated as dubious. In addition, they are updated daily so that the entered call blocks remain up to date. A list with a two-year term costs 19.95 euros. Tellows offers lists for different countries: They are based on the ratings of users from the respective country. For example, the list for Germany contains domestic and international numbers under which German Tellows users received spam calls.

From Fritz OS 7.20, Fritz boxes can use online telephone books via the CardDAV protocol. Ready-made blacklists can also be used against spam calls.

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From Fritz OS 7.20, Fritz boxes can use online telephone books via the CardDAV protocol. Ready-made blacklists can also be used against spam calls.

This score list is particularly easy to connect to a Fritzbox on which Fritz OS 7.20 or higher is installed. To do this, click in the Fritzbox menu on “Telephony -› Phonebook “and on the right on” New Phonebook “. There you assign a name and select the option “Use the telephone book of an online provider”. From the drop-down menu under “Provider”, select “Card Dev Provider”. Now you have to enter the Internet address from which the Fritzbox fetches the telephone list, the user name tellowsfritz and the ten-digit license number that you received when you bought it. You have two options for the Internet address: The complete list with 1400 entries is available at dav.tellows.de/score/7-9/ – too much for some Fritzbox models.

As an alternative, create two telephone books, each containing 700 entries: Use the internet addresses dav.tellows.de/score/7/ and dav.tellows.de/score/8-9/ for this. If you now confirm with “OK”, the Fritzbox creates the phone books, which can take some time. If you see the message “Update was successful”, click “Next”. Then set up a call block for the Tellows telephone entries: To do this, select “Telephony -› Call Handling ”in the Fritzbox menu and the“ New rule ”entry on the right. In the following window, mark “incoming calls”, select “Phone book” under “Area” and then the phone book with the blacklist. Confirm with OK”. If you have chosen the variant with two phone books, you can also assign the call block to the second block list in the same way.

The Tellows blacklists contain telephone numbers that users of the tellows.de website have classified as dubious spam calls.

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The Tellows blacklists contain telephone numbers that users of the tellows.de website have classified as dubious spam calls.

If you look at the entries in the Tellows telephone book, you can see in the top line how long the list was running and when it was last updated. You can tell whether the blacklist is fulfilling its purpose on the one hand by whether you continue to receive spam calls. If not, you can look in the Fritzbox: If under “Telephony -› Calls – ›Rejected calls” entries referring to the blacklist, a phone number stored in the list has tried to reach you without success.

Tip:

Fritzbox hacks: unlock hidden functions

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