If you view the source for the page listing page you'll see:
Code
<div class="fr t_standard">
<table class="pagination">
<tr>
<td class="pages acvm nw cp" id="pagination_0_control" onclick="showHideMenu('pagination_0_control','pagination_0_popup')" title="Go to page...">Page 1 of 32 <i class="fas fa-chevron-down fa-fw" aria-hidden="true"></i></td>
<td class="page-cur acvm">1</td>
<td class="page-n acvm cp" onclick="location.href='https://www.ubbcentral.com/forums/ubbthreads.php/forums/15/2/how-do-i'" title="Go to page 2"><span style="opacity:0.9;">2</span></td>
<td class="page-n acvm cp" onclick="location.href='https://www.ubbcentral.com/forums/ubbthreads.php/forums/15/3/how-do-i'" title="Go to page 3"><span style="opacity:0.9;">3</span></td>
<td class="page-n acvm cp" onclick="location.href='https://www.ubbcentral.com/forums/ubbthreads.php/forums/15/17/how-do-i'" title="Go to page 17"><span style="opacity:0.9;">&hellip;</span></td>
<td class="page-n acvm cp" onclick="location.href='https://www.ubbcentral.com/forums/ubbthreads.php/forums/15/31/how-do-i'" title="Go to page 31"><span style="opacity:0.9;">31</span></td>
<td class="page-n acvm cp" onclick="location.href='https://www.ubbcentral.com/forums/ubbthreads.php/forums/15/32/how-do-i'" title="Go to page 32"><span style="opacity:0.9;">32</span></td>
<td class="page-n acvm cp" onclick="location.href='https://www.ubbcentral.com/forums/ubbthreads.php/forums/15/2/how-do-i'" title="Go to page 2"><span style="opacity:0.9;"><i class="fas fa-angle-right" aria-hidden="true"></i></span></td>
</tr>
</table>
</div>

Thus the used classes in the generation of these boxes are:
pagination
pages
page-cur
page-n


Likewise, the indicators that display for a multipage thread displayed on the page listing:
Code
<div >
<a href="https://www.ubbcentral.com/forums/ubbthreads.php/topics/263542/7-7-4-changelog-discussion#Post263542">7.7.4 Changelog Discussion</a>
<span class="nw" style="margin-left:5px;">
<a class="pagenav" href="https://www.ubbcentral.com/forums/ubbthreads.php/topics/263542/1/7-7-4-changelog-discussion">1</a>
<a class="pagenav" href="https://www.ubbcentral.com/forums/ubbthreads.php/topics/263542/2/7-7-4-changelog-discussion">2</a>
<a class="pagenav" href="https://www.ubbcentral.com/forums/ubbthreads.php/topics/263542/3/7-7-4-changelog-discussion">3</a>
<a class="pagenavall" href="https://www.ubbcentral.com/forums/ubbthreads.php/topics/263542/all/7-7-4-changelog-discussion">all</a>
</span>
</div>

Indicating the current classes in the editor:
pagenav
pagenavall

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