- Verify consumers’ contact details even when a telephone number is unavailable by adding ex-directory flags
- Part of the BT OSIS subscriber database, the file contains details of over 12.5 million ex-directory listings
- Provides up to three per cent extra usable telephone numbers by adding Directory enQuiry by Request (DQR) records
Over half of the 24 million plus UK consumer telephone numbers are ex-directory.
The release of the XD file in May 2002 provided a number of benefits, not least the ability to verify existing contact details. Although an XD number cannot be provided, a flag confirms that the name and address details on the customer file correspond with the BT data, in turn suggesting an existing telephone number may be usable.
Verification of contact details reduces spend on outbound campaigns and the XD flag also suggests which customers may be less responsive to telesales than other contact channels. Furthermore, XD processing can improve match rates by up to three per cent, adding numbers for Directory enQuiry by Request (DQR) records, which are not available in printed directories.
