icingaweb2/modules/monitoring/application/views/scripts/show/components/header.phtml

<?php $showService = $object->service_description && $tabs->getActiveName() !== 'host' ?>
<?php if (!$this->compact): ?>
<?= $tabs ?>
<?php endif ?>
<table class="objectstate">
  <tr class="state <?= $this->monitoringState($object, 'host') ?><?= $object->host_handled ? ' handled' : '' ?>">
    <td class="state"<?= $showService ? '' : ' rowspan="2"' ?>>
      <?= $this->util()->getHostStateName($object->host_state) ?><br />
      since <?= $this->timeSince($object->host_last_state_change) ?>
    </td>
    <td><b><?= $this->escape($object->host_name) ?></b><?php
 if ($object->host_address && $object->host_address !== $object->host_name): ?>
 <br><?= $this->escape($object->host_address) ?></br>
<?php endif ?>
    </td>
  </tr>
<?php if ($showService): ?>
  <tr class="state <?= $this->monitoringState($object, 'service') ?><?= $object->service_handled ? ' handled' : '' ?>">
    <td class="state">
      <?= $this->util()->getServiceStateName($object->service_state); ?><br />
      since <?= $this->timeSince($object->service_last_state_change) ?>
    </td>
    <td><b>Service: <?= $this->escape($object->service_description) ?></b></td>
  </tr>
<?php else: ?>
  <tr><td><!--<b>Host state</b>-->&nbsp;</td></tr>
<?php endif ?>
</table>