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Check telephone numbers against the Corporate Telephone Preference Service


Check if a number is registered on the Corporate Telephone Preference Service.

This is not the service to use to register your number with CTPS or make a complaint. For those purposes please use the main TPS website

Integrate this service with your CRM or telephone system to ensure telephone numbers are not registered on the CTPS before dialling to stay compliant.

To check a single number use the IsCallable method. If you have multiple numbers for the same contact and want to find the first one which is not CTPS registered use the GetCallableNumber method.

The following methods are available in the CTPS service.


Checks if a telephone number is registered on CTPS or not | data8


Selects the first callable telephone number from a list.