Telephone​Line​Validation

Check if a landline number is valid and active

This service is deprecated in favour of the PhoneValidation service. This service will remain operational for the foreseeable future, but the PhoneValidation service should be used for all new development.

Overview

Check a landline number in real-time against the network.

The telephone line validation web service includes a simple method of verifying if a UK landline telephone number is valid and currently in-use.