Whether you only call your customers once in a while or are mainly involved in telemarketing, wrong phone numbers cost money, from time to time, to fees, to lost profits.

By updating and adding telephone numbers you can exploit the full potential of your customer data. Furthermore, by using the right telephone numbers you save a lot of time and money. In telemarketing, this also means that campaigns can be better planned and optimised.

PRODATA has been successfully offering the service of telephone number determination on the market for more than 29 years. During this time our matching algorithms have been continuously improved. As a result, our hit rate is usually higher than that of our competitors and you can assume a hit rate of 75% for maintained data. We can also offer you telephone numbers and other features for almost all major countries worldwide.

Further advantages of a telephone number determination at PRODATA are the actuality of our telephone numbers as well as the extent of our data stock. Thus we receive daily the information entries of the customers of all fixed network and mobile phone providers for directory assistance, telephone directories, electronic information and inverse search.

  • Extensive and constantly updated reference databases worldwide

  • Professional browsers with multistage phonetic alignments

  • Efficient and cost telephone campaign

Your targets

  • Current telephone numbers of your customers

  • Cost-saving and fast

  • Increase of data quality

  • Possibility of automated comparisons at any time

  • Adaption of search routine to your individual needs

  • A high rate of research

  • International research

Let us show you how you too can benefit, call us at +49-721-98171-333 or send us an e-mail to

Possibilities of telephone number researches in detail

Possibility 1

Online interface

  • Automated process to enhance an address with a telephone number
  • Integration in already existing programs and applications e.g. websites or call center software

Possibility 2

Data service

  • Professional and experienced employees conduct the researches
  • Individual possibility to complement address data bases with telephone numbers
  • Different formats can be processed
  • A prepared qualification of the addresses is possible

Possibility 3a)

Automated services


  • Is automated through the total standardization of the file formats
  • Fast research all the time
  • Especially cost-saving
  • Upload of the files over FTP, integration in already existing processes is possible

Possibility 3b)

Automated services

b) webportal-upload

  • Is automated through the total standardization of the file formats
  • Fast research all the time
  • Especially cost-saving
  • Manual upload of the files over a web portal
  • quality

    Additionally, PRODATA uses several professional instruments for enhancement and comparison.
    We reach an optimal data quality thanks to highly sophisticated search routines with multi-level phonetic comparisons.
    After the enhancement of your customer data, we check your database for completeness and accuracy. Following this, we generate a documentation of the whole project so you can consistently reconstruct the individual steps without any gaps.


    We offer cost-effective subscriptions for regular data enhancement, for example weekly amendment of phone numbers for call centers.


    Your data is in good hands , PRODATA is regarded as a clearing house in the market. PRODATA is a member of the DDV where he has left a DDV Privacy Policy. Your order will be regulated by a concluded §11 treaty to order data processing , which includes all the necessary data protection measures.

    Here you will find extensive information about the very important PRODATA focus handling and protecting your data – data protection.

Trust in the experience of 29 years and over 1000 successful projects.

You can look forward to innovative ideas and their first-class implementation. You are in the best of hands at PRODATA. Get off to a successful start with us!

We can proudly look back on a multitude of successful projects.

Your direct contact


Kriegsstraße 236
76135 Karlsruhe