diff --git a/netbox/ipam/forms/bulk_import.py b/netbox/ipam/forms/bulk_import.py
index b829083e3..7eba6375f 100644
--- a/netbox/ipam/forms/bulk_import.py
+++ b/netbox/ipam/forms/bulk_import.py
@@ -9,13 +9,16 @@ from ipam.constants import *
 from ipam.models import *
 from netbox.forms import NetBoxModelImportForm
 from tenancy.models import Tenant
-from utilities.forms import CSVChoiceField, CSVContentTypeField, CSVModelChoiceField, SlugField, \
-    CSVModelMultipleChoiceField
+from utilities.forms.fields import (
+    CSVChoiceField, CSVContentTypeField, CSVModelChoiceField, CSVModelMultipleChoiceField, SlugField,
+)
+
 from virtualization.models import VirtualMachine, VMInterface
 
 __all__ = (
     'AggregateImportForm',
     'ASNImportForm',
+    'ASNRangeImportForm',
     'FHRPGroupImportForm',
     'IPAddressImportForm',
     'IPRangeImportForm',
@@ -40,10 +43,25 @@ class VRFImportForm(NetBoxModelImportForm):
         to_field_name='name',
         help_text=_('Assigned tenant')
     )
+    import_targets = CSVModelMultipleChoiceField(
+        queryset=RouteTarget.objects.all(),
+        required=False,
+        to_field_name='name',
+        help_text=_('Import route targets')
+    )
+    export_targets = CSVModelMultipleChoiceField(
+        queryset=RouteTarget.objects.all(),
+        required=False,
+        to_field_name='name',
+        help_text=_('Export route targets')
+    )
 
     class Meta:
         model = VRF
-        fields = ('name', 'rd', 'tenant', 'enforce_unique', 'description', 'comments', 'tags')
+        fields = (
+            'name', 'rd', 'tenant', 'enforce_unique', 'description', 'import_targets', 'export_targets', 'comments',
+            'tags',
+        )
 
 
 class RouteTargetImportForm(NetBoxModelImportForm):
@@ -65,9 +83,6 @@ class RIRImportForm(NetBoxModelImportForm):
     class Meta:
         model = RIR
         fields = ('name', 'slug', 'is_private', 'description', 'tags')
-        help_texts = {
-            'name': _('RIR name'),
-        }
 
 
 class AggregateImportForm(NetBoxModelImportForm):
@@ -88,6 +103,24 @@ class AggregateImportForm(NetBoxModelImportForm):
         fields = ('prefix', 'rir', 'tenant', 'date_added', 'description', 'comments', 'tags')
 
 
+class ASNRangeImportForm(NetBoxModelImportForm):
+    rir = CSVModelChoiceField(
+        queryset=RIR.objects.all(),
+        to_field_name='name',
+        help_text=_('Assigned RIR')
+    )
+    tenant = CSVModelChoiceField(
+        queryset=Tenant.objects.all(),
+        required=False,
+        to_field_name='name',
+        help_text=_('Assigned tenant')
+    )
+
+    class Meta:
+        model = ASNRange
+        fields = ('name', 'slug', 'rir', 'start', 'end', 'tenant', 'description', 'tags')
+
+
 class ASNImportForm(NetBoxModelImportForm):
     rir = CSVModelChoiceField(
         queryset=RIR.objects.all(),
@@ -166,16 +199,31 @@ class PrefixImportForm(NetBoxModelImportForm):
     def __init__(self, data=None, *args, **kwargs):
         super().__init__(data, *args, **kwargs)
 
-        if data:
+        if not data:
+            return
 
-            # Limit VLAN queryset by assigned site and/or group (if specified)
-            params = {}
-            if data.get('site'):
-                params[f"site__{self.fields['site'].to_field_name}"] = data.get('site')
-            if data.get('vlan_group'):
-                params[f"group__{self.fields['vlan_group'].to_field_name}"] = data.get('vlan_group')
-            if params:
-                self.fields['vlan'].queryset = self.fields['vlan'].queryset.filter(**params)
+        site = data.get('site')
+        vlan_group = data.get('vlan_group')
+
+        # Limit VLAN queryset by assigned site and/or group (if specified)
+        query = Q()
+
+        if site:
+            query |= Q(**{
+                f"site__{self.fields['site'].to_field_name}": site
+            })
+            # Don't Forget to include VLANs without a site in the filter
+            query |= Q(**{
+                f"site__{self.fields['site'].to_field_name}__isnull": True
+            })
+
+        if vlan_group:
+            query &= Q(**{
+                f"group__{self.fields['vlan_group'].to_field_name}": vlan_group
+            })
+
+        queryset = self.fields['vlan'].queryset.filter(query)
+        self.fields['vlan'].queryset = queryset
 
 
 class IPRangeImportForm(NetBoxModelImportForm):
@@ -205,7 +253,8 @@ class IPRangeImportForm(NetBoxModelImportForm):
     class Meta:
         model = IPRange
         fields = (
-            'start_address', 'end_address', 'vrf', 'tenant', 'status', 'role', 'description', 'comments', 'tags',
+            'start_address', 'end_address', 'vrf', 'tenant', 'status', 'role', 'mark_utilized', 'description',
+            'comments', 'tags',
         )
 
 
@@ -391,10 +440,6 @@ class VLANImportForm(NetBoxModelImportForm):
     class Meta:
         model = VLAN
         fields = ('site', 'group', 'vid', 'name', 'tenant', 'status', 'role', 'description', 'comments', 'tags')
-        help_texts = {
-            'vid': 'Numeric VLAN ID (1-4094)',
-            'name': 'VLAN name',
-        }
 
 
 class ServiceTemplateImportForm(NetBoxModelImportForm):
@@ -435,7 +480,7 @@ class ServiceImportForm(NetBoxModelImportForm):
     class Meta:
         model = Service
         fields = (
-        'device', 'virtual_machine', 'ipaddresses', 'name', 'protocol', 'ports', 'description', 'comments', 'tags')
+            'device', 'virtual_machine', 'ipaddresses', 'name', 'protocol', 'ports', 'description', 'comments', 'tags')
 
 
 class L2VPNImportForm(NetBoxModelImportForm):
@@ -451,7 +496,8 @@ class L2VPNImportForm(NetBoxModelImportForm):
 
     class Meta:
         model = L2VPN
-        fields = ('identifier', 'name', 'slug', 'type', 'description', 'comments', 'tags')
+        fields = ('identifier', 'name', 'slug', 'tenant', 'type', 'description',
+                  'comments', 'tags')
 
 
 class L2VPNTerminationImportForm(NetBoxModelImportForm):
@@ -510,9 +556,11 @@ class L2VPNTerminationImportForm(NetBoxModelImportForm):
 
         if self.cleaned_data.get('device') and self.cleaned_data.get('virtual_machine'):
             raise ValidationError('Cannot import device and VM interface terminations simultaneously.')
-        if not (self.cleaned_data.get('interface') or self.cleaned_data.get('vlan')):
+        if not self.instance and not (self.cleaned_data.get('interface') or self.cleaned_data.get('vlan')):
             raise ValidationError('Each termination must specify either an interface or a VLAN.')
         if self.cleaned_data.get('interface') and self.cleaned_data.get('vlan'):
             raise ValidationError('Cannot assign both an interface and a VLAN.')
 
-        self.instance.assigned_object = self.cleaned_data.get('interface') or self.cleaned_data.get('vlan')
+        # if this is an update we might not have interface or vlan in the form data
+        if self.cleaned_data.get('interface') or self.cleaned_data.get('vlan'):
+            self.instance.assigned_object = self.cleaned_data.get('interface') or self.cleaned_data.get('vlan')