API-Key Business for Blacklists

tellows score

The tellows blacklists for your PBX - The perfect solution for your company

It is not only at home that we want to experience a secure telephone feeling. In the office, too, it is important to use it in a time sparing and resource-saving way. So why waste time on advertising calls when you can only put through the really important calls from customers? With the tellows API access you get the possibility to download the current telephone numbers of the spam database as a CSV-blacklist and add the data into your PBX. The list contains for all telephone numbers, the caller name, caller type and the tellows score (risk assessment).


tellows score The tellows number ratings range on a scale of 1 - 9, with 1 being considered serious and 9 being extremely untrustworthy. The blacklists contain the tellows rating from 7 - 9 and thus warn you of a dubious caller as soon as the phone rings. More than 40.000 data sets and 1,3 million visitors per month enable the largest community of telephone numbers to offer you the most successful blacklists and spam filters for the telephone! Several hundred people leave their comments and ratings on the numbers they call each day - all of this is incorporated into the blacklists! Benefit from real-time synchronisation with systems like Asterisk. With the tellows API Key a live number query can be made on tellows servers. This way your protection against annoying calls is always up to date, because information about each phone number can be synchronised in real-time with the terminal device and can be processed, blocked and suppressed accordingly. Annoying advertising calls are therefore passè.
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