diff --git a/machines/forms.py b/machines/forms.py
index 6b3d905e..d54427e1 100644
--- a/machines/forms.py
+++ b/machines/forms.py
@@ -137,3 +137,14 @@ class DelMxForm(ModelForm):
         exclude = ['zone', 'priority', 'name']
         model = Mx
 
+class NsForm(ModelForm):
+    class Meta:
+        model = Ns
+        fields = ['zone', 'interface']
+
+class DelNsForm(ModelForm):
+    ns = forms.ModelMultipleChoiceField(queryset=Ns.objects.all(), label="Enregistrements NS actuels",  widget=forms.CheckboxSelectMultiple)
+
+    class Meta:
+        exclude = ['zone', 'interface']
+        model = Ns
diff --git a/machines/models.py b/machines/models.py
index bf1eca2e..0ff636c2 100644
--- a/machines/models.py
+++ b/machines/models.py
@@ -64,6 +64,9 @@ class Ns(models.Model):
     zone = models.ForeignKey('Extension', on_delete=models.PROTECT)
     interface = models.OneToOneField('Interface', on_delete=models.PROTECT)
 
+    def __str__(self):
+        return str(self.zone) + ' ' + str(self.interface)
+
 class Interface(models.Model):
     PRETTY_NAME = "Interface"
 
diff --git a/machines/templates/machines/aff_ns.html b/machines/templates/machines/aff_ns.html
new file mode 100644
index 00000000..56ba3b3e
--- /dev/null
+++ b/machines/templates/machines/aff_ns.html
@@ -0,0 +1,24 @@
+    <table class="table table-striped">
+        <thead>
+            <tr>
+		    <th>Zone concernée</th>
+		    <th>Interface autoritaire de la zone</th>
+		    <th></th>
+                <th></th>
+            </tr>
+        </thead>
+        {% for ns in ns_list %}
+        <tr>
+            <td>{{ ns.zone }}</td>
+	    <td>{{ ns.interface }}</td>
+            <td class="text-right">
+            {% if is_infra %}
+            {% include 'buttons/edit.html' with href='machines:edit-ns' id=ns.id %}
+            {% endif %}
+            {% include 'buttons/history.html' with href='machines:history' name='ns' id=ns.id %}
+            </td>
+        </tr>
+        {% endfor %}
+    </table>
+
+
diff --git a/machines/templates/machines/index_extension.html b/machines/templates/machines/index_extension.html
index d058f805..f47b05d6 100644
--- a/machines/templates/machines/index_extension.html
+++ b/machines/templates/machines/index_extension.html
@@ -17,7 +17,13 @@
    <a class="btn btn-danger btn-sm" role="button" href="{% url 'machines:del-mx'  %}"><i class="glyphicon glyphicon-trash"></i> Supprimer un enregistrement MX</a>
    {% endif %}
    {%  include "machines/aff_mx.html" with  mx_list=mx_list %}
-  <br />
+  <h2>Liste des enregistrements NS</h2>
+   {% if is_infra %}
+   <a class="btn btn-primary btn-sm" role="button" href="{% url 'machines:add-ns'  %}"><i class="glyphicon glyphicon-plus"></i> Ajouter un enregistrement NS</a>
+   <a class="btn btn-danger btn-sm" role="button" href="{% url 'machines:del-ns'  %}"><i class="glyphicon glyphicon-trash"></i> Supprimer un enregistrement NS</a>
+   {% endif %}
+   {%  include "machines/aff_ns.html" with  ns_list=ns_list %}
+   <br />
   <br />
   <br />
   {% endblock %}
diff --git a/machines/urls.py b/machines/urls.py
index e3f47578..b93c0373 100644
--- a/machines/urls.py
+++ b/machines/urls.py
@@ -23,12 +23,16 @@ urlpatterns = [
     url(r'^add_mx/$', views.add_mx, name='add-mx'),
     url(r'^edit_mx/(?P<mxid>[0-9]+)$', views.edit_mx, name='edit-mx'),
     url(r'^del_mx/$', views.del_mx, name='del-mx'),
+    url(r'^add_ns/$', views.add_ns, name='add-ns'),
+    url(r'^edit_ns/(?P<nsid>[0-9]+)$', views.edit_ns, name='edit-ns'),
+    url(r'^del_ns/$', views.del_ns, name='del-ns'),
     url(r'^index_extension/$', views.index_extension, name='index-extension'),
     url(r'^history/(?P<object>machine)/(?P<id>[0-9]+)$', views.history, name='history'),
     url(r'^history/(?P<object>interface)/(?P<id>[0-9]+)$', views.history, name='history'),
     url(r'^history/(?P<object>machinetype)/(?P<id>[0-9]+)$', views.history, name='history'),
     url(r'^history/(?P<object>extension)/(?P<id>[0-9]+)$', views.history, name='history'),
     url(r'^history/(?P<object>mx)/(?P<id>[0-9]+)$', views.history, name='history'),
+    url(r'^history/(?P<object>ns)/(?P<id>[0-9]+)$', views.history, name='history'),
     url(r'^history/(?P<object>iptype)/(?P<id>[0-9]+)$', views.history, name='history'),
     url(r'^$', views.index, name='index'),
     url(r'^rest/mac-ip/$', views.mac_ip, name='mac-ip'),
diff --git a/machines/views.py b/machines/views.py
index 8dd15711..3e5a25aa 100644
--- a/machines/views.py
+++ b/machines/views.py
@@ -22,7 +22,7 @@ from reversion import revisions as reversion
 
 import re
 from .forms import NewMachineForm, EditMachineForm, EditInterfaceForm, AddInterfaceForm, MachineTypeForm, DelMachineTypeForm, ExtensionForm, DelExtensionForm, BaseEditInterfaceForm, BaseEditMachineForm, Alias
-from .forms import IpTypeForm, DelIpTypeForm, NewAliasForm, EditAliasForm, MxForm, DelMxForm
+from .forms import IpTypeForm, DelIpTypeForm, NewAliasForm, EditAliasForm, NsForm, DelNsForm, MxForm, DelMxForm
 from .models import IpType, Machine, Interface, IpList, MachineType, Extension, Mx, Ns
 from users.models import User
 from re2o.settings import PAGINATION_NUMBER, PAGINATION_LARGE_NUMBER
@@ -417,6 +417,54 @@ def del_mx(request):
         return redirect("/machines/index_extension")
     return form({'machineform': mx, 'interfaceform': None}, 'machines/machine.html', request)
 
+@login_required
+@permission_required('infra')
+def add_ns(request):
+    ns = NsForm(request.POST or None)
+    if ns.is_valid():
+        with transaction.atomic(), reversion.create_revision():
+            ns.save()
+            reversion.set_user(request.user)
+            reversion.set_comment("Création")
+        messages.success(request, "Cet enregistrement ns a été ajouté")
+        return redirect("/machines/index_extension")
+    return form({'machineform': ns, 'interfaceform': None}, 'machines/machine.html', request)
+
+@login_required
+@permission_required('infra')
+def edit_ns(request, nsid):
+    try:
+        ns_instance = Ns.objects.get(pk=nsid)
+    except Ns.DoesNotExist:
+        messages.error(request, u"Entrée inexistante" )
+        return redirect("/machines/index_extension/")
+    ns = NsForm(request.POST or None, instance=ns_instance)
+    if ns.is_valid():
+        with transaction.atomic(), reversion.create_revision():
+            ns.save()
+            reversion.set_user(request.user)
+            reversion.set_comment("Champs modifié(s) : %s" % ', '.join(field for field in ns.changed_data))
+        messages.success(request, "Ns modifié")
+        return redirect("/machines/index_extension/")
+    return form({'machineform': ns}, 'machines/machine.html', request)
+
+@login_required
+@permission_required('infra')
+def del_ns(request):
+    ns = DelNsForm(request.POST or None)
+    if ns.is_valid():
+        ns_dels = ns.cleaned_data['ns']
+        for ns_del in ns_dels:
+            try:
+                with transaction.atomic(), reversion.create_revision():
+                    ns_del.delete()
+                    reversion.set_user(request.user)
+                messages.success(request, "Le ns a été supprimée")
+            except ProtectedError:
+                messages.error(request, "Erreur le Ns suivant %s ne peut être supprimé" % ns_del)
+        return redirect("/machines/index_extension")
+    return form({'machineform': ns, 'interfaceform': None}, 'machines/machine.html', request)
+
 @login_required
 @permission_required('cableur')
 def index(request):
@@ -497,6 +545,12 @@ def history(request, object, id):
         except Mx.DoesNotExist:
              messages.error(request, "Mx inexistant")
              return redirect("/machines/")
+    elif object == 'ns' and request.user.has_perms(('cableur',)):
+        try:
+             object_instance = Ns.objects.get(pk=id)
+        except Ns.DoesNotExist:
+             messages.error(request, "Ns inexistant")
+             return redirect("/machines/")
     else:
         messages.error(request, "Objet  inconnu")
         return redirect("/machines/")