If you have a question or are experiencing problems with the service, please contact the CASC on 0800 389 2272.
Note: Please have your ID and authorisation information available when you call the support number. Your ATO may control all contact with the CASC and therefore, they will
have the information required by the CASC to confirm you are an authorised user.
The help pages are here for users to get the most out of the service. From here you can download user documentation and online tutorials.
Learn more about DFTS smartnumbers. Access the latest online training materials and user guides.
The latest user documentation which can be viewed or downloaded in printable format. Getting started, frequently asked questions & quick reference guides.
You will notice that your DFTS smartnumbers now begins with 030. This is a new number range introduced by Ofcom which is non-geographic and unrelated to a particular local area.