The Electronic Phonebook is configured so that it will return no more than 25 matches for a given search. This limit exists to make it difficult for the Phonebook to be used for unscrupulous purposes, such as mass e-mailing (often known as spamming), and is set in accordance with the UAB Information Disclosure Policy of December 10, 2002 (available online in PDF format). If you have not already done so, you may want to try pulling down the search box which normally says "all listings", and change it so you match only employees or students, as appropriate.