netbox-community-netbox/netbox/templates/ipam/aggregate/base.html

{% extends 'generic/object.html' %}
{% load buttons %}
{% load helpers %}

{% block breadcrumbs %}
  {{ block.super }}
  <li class="breadcrumb-item"><a href="{% url 'ipam:aggregate_list' %}?rir_id={{ object.rir.pk }}">{{ object.rir }}</a></li>
{% endblock %}

{% block extra_tabs %}
  {% if perms.ipam.view_prefix %}
    <li role="presentation" class="nav-item">
      <a class="nav-link{% if active_tab == 'prefixes' %} active{% endif %}" href="{% url 'ipam:aggregate_prefixes' pk=object.pk %}">
        Prefixes {% badge object.get_child_prefixes.count %}
      </a>
    </li>
  {% endif %}
{% endblock %}