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On this picture: the NMHH logo and a smart television in the customer service office of the NMHH

The website Szélessá is operated by the National Media and Infocommunications Authority (NMHH).

Customer Service contact information:

  • Mailing address: 1133 Budapest, Visegrádi u. 106.
  • Telephone: (06 1) 468 0673
  • E-mail:


You may also use the following electronic form to send our customer service a message, question or comment. We strive to answer questions submitted this way within one or two working days, just as fast as if you sent your message by e-mail.
If you are not sure what data to enter into a specific field, click on the question mark at the end of the line. The information in the pop-up window will help you enter the correct information.
Fields marked by the [*] are mandatory.
Your email adress:*
Your email address again:*
The text of the letter:*
attachments #1:
attachments #2:
Security verification code:*
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When to contact us?
  • if you find any abnormal website behaviour;
  • if you have difficulties to register;
  • if you run into a problem during the software measurement;
  • if you want to request a measuring box or you have any question about using the device;
  • if you have a question about how and for what purpose you can use the measurement results;
  • if you need any other support about the Internet measurement.
NMHH on map