diff --git a/lib/netbox_client_ruby/api/ipam.rb b/lib/netbox_client_ruby/api/ipam.rb
index ac7257f..9ab47af 100644
--- a/lib/netbox_client_ruby/api/ipam.rb
+++ b/lib/netbox_client_ruby/api/ipam.rb
@@ -12,7 +12,8 @@ module IPAM
       services: Services,
       vlans: Vlans,
       vlan_groups: VlanGroups,
-      vrfs: Vrfs
+      vrfs: Vrfs,
+      asns: Asns
     }.each_pair do |method_name, class_name|
       define_method(method_name) { class_name.new }
       module_function(method_name)
@@ -28,7 +29,8 @@ module IPAM
       service: Service,
       vlan: Vlan,
       vlan_group: VlanGroup,
-      vrf: Vrf
+      vrf: Vrf,
+      asn: Asn
     }.each_pair do |method_name, class_name|
       define_method(method_name) { |id| class_name.new id }
       module_function(method_name)
diff --git a/lib/netbox_client_ruby/api/ipam/asn.rb b/lib/netbox_client_ruby/api/ipam/asn.rb
new file mode 100644
index 0000000..7df5db5
--- /dev/null
+++ b/lib/netbox_client_ruby/api/ipam/asn.rb
@@ -0,0 +1,18 @@
+# frozen_string_literal: true
+
+module NetboxClientRuby
+  module IPAM
+    class Asn
+      include Entity
+
+      id id: :id
+      deletable true
+      path 'ipam/asns/:id/'
+      creation_path 'ipam/asns/'
+      object_fields(
+        tenant: proc { |raw_data| Tenancy::Tenant.new raw_data['id'] }
+      )
+    end
+
+  end
+end
diff --git a/lib/netbox_client_ruby/api/ipam/asns.rb b/lib/netbox_client_ruby/api/ipam/asns.rb
new file mode 100644
index 0000000..b0f6a4c
--- /dev/null
+++ b/lib/netbox_client_ruby/api/ipam/asns.rb
@@ -0,0 +1,20 @@
+# frozen_string_literal: true
+
+module NetboxClientRuby
+  module IPAM
+    class Asns
+      include Entities
+
+      path 'ipam/asns/'
+      data_key 'results'
+      count_key 'count'
+      entity_creator :entity_creator
+
+      private
+
+      def entity_creator(raw_entity)
+        Asn.new raw_entity['id']
+      end
+    end
+  end
+end