Contact information

Name of the team

KPN-CERT: the Computer Emergency Response Team of KPN.


Royal KPN N.V.
The Hague
Chief Information Security Office
Maanplein 55
2516 CK The Hague

Correspondence address:
P.O. box 30000
2500 GA The Hague

Time zone

KPN-CERT uses Central European Time (CET), including Daylight Saving Time (DST).

As such, UTC+0100 in winter and UTC+0200 in summer.

Telephone number

KPN-CERT is only reachable by phone for KPN employees.

General contact information of KPN can be found here.

Fax Number


Other Telecommunication


E-mail addresses

The KPN-CERT is reachable via (main mail address) and (for questions only). Apart from the addresses listed above, each member of the CERT team has a personal e-mail address in the domain. Please do not use personal addresses for communicating incidents, questions, and so on; use the KPN-CERT main address instead.

General contact information of KPN can be found here.

Abusive behaviour from IP addresses originating from KPN’s network, as well as phishing e-mails in KPN’s name, can be reported to the abuse desk:

Responsible disclosure reports can be sent to If applicable, use the PGP key to send the report encrypted. Click here for more information and our conditions regarding responsible disclosure reports.

Public keys and encryption information

See this page for the KPN-CERT PGP Key.                                                               

Team members

See this page for KPN-CERT members.

Other information