How can I modify the incorrect data in the telephone guide
Contact the Service of Telephone Guides at 0800 98 022 or do it yourself via http://www.1307.be/modifiez-vos-donnees (French) and http://www.1207.be/uw-gegevens-aanpassen (Dutch).
How do I know that the changes have taken place?
The new and/or modified data is available at 1207.be or 1307.be 48 hours later after the modification has been done. The new data is also mentioned in the next edition of the phone book. The modifications are being accepted until the release date of every part of the book. The new data can be found at 1207.be or 1307.be some days later after the request.