The National Technical Authority
for Information Assurance

How to contact CESG

Unless otherwise stated you should contact CESG Enquiries using the details below:

CESG Enquiries
Room A3E
Hubble Road
Cheltenham
Gloucestershire
GL51 0EX

Phone: 01242 709141
Fax: 01242 709193
E-mail: enquiries@cesg.gsi.gov.uk 

If you know the name or extension of the person you want to speak to:

Phone 01242 221491 and enter the extension number when prompted or wait to speak to an operator.

FOR URGENT ENQUIRIES OUT OF HOURS:

GCHQ Duty Officer: 01242 221491 ext. 24000