tellows Fritz!Box Number Blacklist (Commercial Usage) - 1 Year

The spam filter for your Fritz!Box - saves time, money and a lot of nerves! Simply block phone numbers that are rated negative by the community. This allows you to immediately recognize unwanted calls as such. Get now the tellows scorelists with all classified as dubious telephone numbers of the tellows community on your Fritz!Box for your business.

This product is only for commercial use. If you want to use the tellows scorelists privately, we recommend this product. For an extended usage than specified or blacklists for another country, please contact contact us, so that we can find an individual solution for you
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Over 8 million monthly users worldwide

Over 150.000 ratings for phone numbers per month

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Solutions for private and commercial usage

After payment is received the blacklists are immediately available in the download area

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The tellows spam filter - saves time & money!

The tellows score lists contain all current dubious phone numbers of the tellows community which enables you to block annoying advertising calls. This allows you to immediately recognize unwanted advertising calls or block phone numbers that have negative ratings from the community. The handling is uncomplicated: just set up the score lists once and because if the automatic update no further configuration is necessary. You can activate a call block for the blacklists within the FRITZ!Box so that you do not receive unwanted calls in the first place.

The quick guide refers to the integration for Fritz!Boxes with Fritz! OS 7.20 or higher. For older models, use manual integration (see full instructions: manual import).

Quick guide

  • 1. Click on "Create new phone book" (in the Telephony / Phone book tab)
  • 2. Select "Use the phone book of an online provider"
  • 3. Select "CardDAV provider"
  • 4. Fill in the following URL: in "Internet address of the CardDAV server"
  • 5. " Enter tellowsfritz as "Username"
  • 6. As "Password" enter your API key from the download PDF
  • 7. Then repeat the steps for the second phone book with the URL
  • 8. Optional: Activate call blocker for incoming calls from the phone books
Detailed instructions

The login data is visible in the download area of your shop account after purchase.

You can find all information about setting up the score lists in the following video (please activate subtitles)

By importing the phone numbers rated as dubious unwanted callers which are known to the tellows community are recognized as soon as the phone rings. It is up to you if rather hang up, divert the call or engage the uninvited caller in a funny conversation and put the number on the blacklist later! The displayed score will also help you to decide which numbers to block directly. In order to block incoming calls from the created phone books the call block in your TS must be activated so that these numbers are not put through in the first place. For personalization, simply connect your shop account to your account on and the phone numbers you rated yourself will be taken into account.

The tellows score helps you to evaluate the integrity of a number. The higher the score, the more dubious the number. The scale ranges from 1 (trustworthy) to 9 (dubious) and numbers above 7 are perceived as dubious and are part of the blacklists. For the FRITZ!Box, the numbers with score 7 and score 8-9 are grouped together in a phone book. If you integrate the blacklists for the FRITZ!Box, you can decide for yourself you either want to use all scores (score 7-9) or for example only want to integrate the most dangerous classified numbers (score 8-9). We recommend using both lists. After the purchase you will find the license key in the download area of your shop account.

The score list for the country you selected contains numbers reported by people from that country. This includes national and international numbers. For optimal protection it is not necessary to use lists from several countries.

Extend number blacklist: Add more phone numbers to the blacklist
The tellows caller protection includes numbers that were perceived as undesirable by various users and are currently active.

Additional telephone numbers that are not currently on the blacklist can be added to the tellows blacklist (telephone book) with just a few clicks via your FRITZ!Fon or the FRITZ!Box. These numbers will be automatically blocked in the future. Dubious phone numbers that you have added to the tellows phone book remain with every update and are recognized and blocked in addition to the community phone numbers that have already been reported. If the telephone number you have reported is rated negatively by other tellows users, the number will be added to the community blacklist and all tellows users will benefit from it. Further information on editing the phone books.

The scorelists can be linked to your tellows user account. Negatively rated numbers land immediately on your personal block list and are included on the imported score lists. It is important to log in to the website or to link the app to your tellows account. The personal block list contains all numbers that you have rated yourself (regardless of the ratings of other users) and of course all other phone numbers rated by tellows users. More information on personal block lists and registration.

The blacklists are valid for 1 year and contain all current negative rated numbers.

After the successful payment of your order, you can directly access the score lists. All you have to do is to log into your tellows shop account and to download the access data for the score list. You can find the access data in your download area: "My account" and "My downloadable products".

Then click on the link of your purchased item. A PDF file with your access data for the score lists will be downloaded. Save the PDF and open it. For manual import, please follow the manual instructions. For the automatic import with updates you only need the API key of the document. Please follow the instructions in order to avoid mistakes!

From FritzOS 7.20 or version FritzOS it is possible to link an online telephone book to the FRITZ!Box. Therefore, tellows provides a CardDAV server. This integration offers the advantages of a very easy integration of the tellows scores and automatic updates. This means that manual downloading of the lists is no longer necessary. In addition, you can activate a call blocker for the online phone books.

If your FRITZ!Box does not support an online telephone book, you can import the lists manually.

> Detailed instructions can be found here

Note: To import the tellows score lists into the FRITZ!Box you must have admin rights for the FRITZ!Box. We only guarantee the function for the FRITZ!Box types that are available for selection. We are not liable for equipment damage that may result by creating or importing the tellows score lists in the FRITZ!Box. To show the tellows Score on your phone's display it must be able to show more details about a number.

How can I renew my license?
If you purchased the call protection from, you can extend the existing license without configuring your setup new. To do this, your old license must have expired. If you then purchase the product again with the same shop account that was used for the first purchase, your old license key can be reactivated.

After completing the purchase, you must open the PDF document with the documentation in the download area of ​​your shop account, just as you did for the first purchase. At this moment your license will be reactivated. In the document you will find your license and a notice that the existing license has been extended. You do not have to do anything else. The FritzBox will automatically get the current lists with the reactivated license with the next update so that no new configurations are necessary.

If you have purchased your license from a partner shop (e.g. Amazon), you have to create an account on and link your license in the member area. All you have to do then is use the same email address from the website when purchasing in Otherwise a new license will be created upon purchase and you will have to set up your call protection in the FritzBox with the new license.

We will remind you by email when your license has expired so that the call protection can continue to protect you and does not expire unnoticed.

Why do I get "Error 22" when setting up the CardDAV server?
If an error message occurs after the integration (error 22), the data was entered incorrectly and the server could not be accessed.

Make sure that there are no spaces before or after the server address. Use https and not http. Make sure that all characters in the URL are case-sensitive. If possible copy the URL from the instructions. If any character is missing or incorrect, you will not be able to connect to the server. Correct your information and then connect again.

Why do I get an "Error 26" while setting up the CardDAV server?
If an error message occurs after the integration (e.g. error 26) remove the phone book completely and recreate it. Occasionally, this error happens on the first attempt.

Make sure there is a slash at the end of the server address. If a character is missing, no connection to the server is possible. Phonebooks that were created and changed later may not save the changes correctly. Your corrections will likely not be taken into account if there was an error the first time you created the phone book. For this reason, the phone book should be created again. If you want to create the phone book again, we recommend restarting the FRITZ!Box and deleting the old incorrect phone book first.

It is important to give a recreated phone book again a different name than the previous created phone book. If you use the same name it can happen that the FRITZ!Box loads the old data import from the memory when the phone book is recreated.

Why am I still receiving calls from a scam caller or a number that has already been rated negatively by tellows?
It is possible that you are being called from numbers that tellows does not yet know. Unfortunately, we cannot cover 100% of all unwanted calls, as phone numbers change very frequently and we are only informed about them when they are reported by other users.

However, it is also possible that some of these numbers have already been reported on tellows, but are not in the phone book due to the phone book limit.

Due to the limitation of the FRITZ!Box phone book size, we cannot include all numbers with a negative tellows score in the lists. In order for numbers to be on the list, they must have a certain search volume and a certain number of reviews (at least 3) in the last few weeks. It is possible that the number will soon end up in the lists if users continue to report the number as active. We use this procedure so that numbers that are no longer active or that are improperly rated do not end up on the list.

Can I make changes to the online phone book?
You can remove, edit or manually add entries in the two tellows phone books at any time. You can find out how to proceed in the section about editing blacklists.

How can I make sure the phone book is up to date?
The first entry in every tellows phone book shows the validity of the license and date of the last update. The FRITZ!Box is updated once a day.

I also would like to be protected against calls from abroad. Do I have to purchase all score lists?
The score list for the country you selected contains numbers reported by people from that country. This includes national and international numbers. For optimal protection it is not necessary to use lists from several countries. The call block function of the FRITZ!Box also makes it possible to set up a block for entire country codes.

Will I never receive advertising calls again?
Unfortunately no, because call centres are constantly changing their numbers so that blocks can be bypassed. However, regular updates of the lists can substantial improve in the situation.

How do I keep the score lists up to date if I import them manually?
Simply download the score lists again and import them once a month. So, you always have the currently most active numbers integrated into the spam list. Downloading the lists again is of course free. Important: With the new integration via the tellows CardDAV server the lists are updated automatically every day!

My FRITZ!Box does not have the option to create online phone books by using a CardDAV server. What can I do?
So far, FRITZ!Box with Fritz! OS 7.20 and higher as well as the laboratory version of 7.19 support CardDAV server integration. Check if an update is available for your FRITZ!BOX. If the function is not supported at all you can activate the lists manually by creating the phone books and importing the blacklists. These must be updated manually on a regular basis. You can find the procedure in the instruction for manual import.

Which FRITZ!Box types are compatible with the tellows score lists?
All FRITZ!Boxs mentioned below were checked for functionality using the tellows blacklists. Basically, with every FRITZ!Box that has a telephone feature you should be able to use the tellows blacklists. If you would like to become a tester, please contact our customer support.

Further FAQs can be found here.

The integration for the automatic updated blacklists using the CardDAV server is suitable for all FRITZ!Boxes with Fritz! OS 7.20 or higher. Check available updates in the system settings of your FRITZ!Box.

The manual integration is suitable for the following Fritz boxes:

Blacklists for FRITZ!Box 6360
Blacklists for FRITZ!Box 6490
Blacklists for FRITZ!Box 6591
Blacklists for FRITZ!Box 7270
Blacklists for FRITZ!Box 7272
Blacklists for FRITZ!Box 7330
Blacklists for FRITZ!Box 7340
Blacklists for FRITZ!Box 7360
Blacklists for FRITZ!Box 7360sl
Blacklists for FRITZ!Box 7390
Blacklists for FRITZ!Box 7430
Blacklists for FRITZ!Box 7490
Blacklists for FRITZ!Box 7560
Blacklists for FRITZ!Box 7580
Blacklists for FRITZ!Box 7590

The largest community for telephone numbers, with over 40,000 datasets and 1.3 million visitors per month makes the call blocker and spam filter for your TS so successful! The score lists contain selected, active numbers that have been reported on Hundreds of users comment and rate numbers on a daily basis - that's all part of the score lists.

tellows UG provides its offer exclusively to commercial usage. If you are interested in using it for private purpose, you find the suitable prodct here.

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