<p>Depends on the school. Two examples of large, well regarded, flagship universities:</p>
<p>UVA comes right out and says they don’t care, they don’t keep track, and there isn’t even a place to register for visits.</p>
<p>UNC-CH, on the other hand, has a site to register, where from that point on every contact you make, including calls, is tallied, and they specifically state that they consider interest in admissions.</p>