diff --git a/specification/azurestack/resource-manager/Microsoft.AzureStack/preview/2020-06-01-preview/Registration.json b/specification/azurestack/resource-manager/Microsoft.AzureStack/preview/2020-06-01-preview/Registration.json
index 81bd4d72a687..4c8bed535693 100644
--- a/specification/azurestack/resource-manager/Microsoft.AzureStack/preview/2020-06-01-preview/Registration.json
+++ b/specification/azurestack/resource-manager/Microsoft.AzureStack/preview/2020-06-01-preview/Registration.json
@@ -57,6 +57,45 @@
         }
       }
     },
+    "/subscriptions/{subscriptionId}/providers/Microsoft.AzureStack/registrations": {
+      "get": {
+        "x-ms-examples": {
+          "Returns a list of all registrations under current subscription.": {
+            "$ref": "examples/Registration/ListBySubscription.json"
+          }
+        },
+        "tags": [
+          "Registrations"
+        ],
+        "description": "Returns a list of all registrations under current subscription.",
+        "operationId": "Registrations_ListBySubscription",
+        "parameters": [
+          {
+            "$ref": "AzureStack.json#/parameters/SubscriptionIdParameter"
+          },
+          {
+            "$ref": "AzureStack.json#/parameters/ApiVersionParameter"
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "OK",
+            "schema": {
+              "$ref": "#/definitions/RegistrationList"
+            }
+          },
+          "default": {
+            "description": "Error response describing why the operation failed.",
+            "schema": {
+              "$ref": "AzureStack.json#/definitions/ErrorResponse"
+            }
+          }
+        },
+        "x-ms-pageable": {
+          "nextLinkName": "nextLink"
+        }
+      }
+    },
     "/subscriptions/{subscriptionId}/resourceGroups/{resourceGroup}/providers/Microsoft.AzureStack/registrations/{registrationName}": {
       "get": {
         "x-ms-examples": {
diff --git a/specification/azurestack/resource-manager/Microsoft.AzureStack/preview/2020-06-01-preview/examples/Registration/ListBySubscription.json b/specification/azurestack/resource-manager/Microsoft.AzureStack/preview/2020-06-01-preview/examples/Registration/ListBySubscription.json
new file mode 100644
index 000000000000..31cbdf475a66
--- /dev/null
+++ b/specification/azurestack/resource-manager/Microsoft.AzureStack/preview/2020-06-01-preview/examples/Registration/ListBySubscription.json
@@ -0,0 +1,25 @@
+{
+  "parameters": {
+    "subscriptionId": "dd8597b4-8739-4467-8b10-f8679f62bfbf",
+    "api-version": "2020-06-01-preview"
+  },
+  "responses": {
+    "200": {
+      "body": {
+        "value": [
+          {
+            "id": "/subscriptions/dd8597b4-8739-4467-8b10-f8679f62bfbf/resourceGroups/azurestack/providers/Microsoft.AzureStack/registrations/testregistration",
+            "name": "testregistration",
+            "type": "Microsoft.AzureStack/registrations",
+            "location": "global",
+            "etag": "0d00527e-0000-0000-0000-5a81ebdf0000",
+            "properties": {
+              "objectId": "9e9704ab-561a-4498-ac60-64b2314456ee",
+              "billingModel": "Development"
+            }
+          }
+        ]
+      }
+    }
+  }
+}
diff --git a/specification/azurestack/resource-manager/Microsoft.AzureStack/stable/2016-01-01/Registration.json b/specification/azurestack/resource-manager/Microsoft.AzureStack/stable/2016-01-01/Registration.json
index 355796065ed9..8be68c13c109 100644
--- a/specification/azurestack/resource-manager/Microsoft.AzureStack/stable/2016-01-01/Registration.json
+++ b/specification/azurestack/resource-manager/Microsoft.AzureStack/stable/2016-01-01/Registration.json
@@ -57,6 +57,45 @@
         }
       }
     },
+    "/subscriptions/{subscriptionId}/providers/Microsoft.AzureStack/registrations": {
+      "get": {
+        "x-ms-examples": {
+          "Returns a list of all registrations under current subscription.": {
+            "$ref": "examples/Registration/ListBySubscription.json"
+          }
+        },
+        "tags": [
+          "Registrations"
+        ],
+        "description": "Returns a list of all registrations under current subscription.",
+        "operationId": "Registrations_ListBySubscription",
+        "parameters": [
+          {
+            "$ref": "AzureStack.json#/parameters/SubscriptionIdParameter"
+          },
+          {
+            "$ref": "AzureStack.json#/parameters/ApiVersionParameter"
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "OK",
+            "schema": {
+              "$ref": "#/definitions/RegistrationList"
+            }
+          },
+          "default": {
+            "description": "Error response describing why the operation failed.",
+            "schema": {
+              "$ref": "../../../../../common-types/resource-management/v2/types.json#/definitions/ErrorResponse"
+            }
+          }
+        },
+        "x-ms-pageable": {
+          "nextLinkName": "nextLink"
+        }
+      }
+    },
     "/subscriptions/{subscriptionId}/resourceGroups/{resourceGroup}/providers/Microsoft.AzureStack/registrations/{registrationName}": {
       "get": {
         "x-ms-examples": {
diff --git a/specification/azurestack/resource-manager/Microsoft.AzureStack/stable/2016-01-01/examples/Registration/ListBySubscription.json b/specification/azurestack/resource-manager/Microsoft.AzureStack/stable/2016-01-01/examples/Registration/ListBySubscription.json
new file mode 100644
index 000000000000..ba856fdadce2
--- /dev/null
+++ b/specification/azurestack/resource-manager/Microsoft.AzureStack/stable/2016-01-01/examples/Registration/ListBySubscription.json
@@ -0,0 +1,25 @@
+{
+  "parameters": {
+    "subscriptionId": "dd8597b4-8739-4467-8b10-f8679f62bfbf",
+    "api-version": "2016-01-01"
+  },
+  "responses": {
+    "200": {
+      "body": {
+        "value": [
+          {
+            "id": "/subscriptions/dd8597b4-8739-4467-8b10-f8679f62bfbf/resourceGroups/azurestack/providers/Microsoft.AzureStack/registrations/testregistration",
+            "name": "testregistration",
+            "type": "Microsoft.AzureStack/registrations",
+            "location": "global",
+            "etag": "0d00527e-0000-0000-0000-5a81ebdf0000",
+            "properties": {
+              "objectId": "9e9704ab-561a-4498-ac60-64b2314456ee",
+              "billingModel": "Development"
+            }
+          }
+        ]
+      }
+    }
+  }
+}
diff --git a/specification/azurestack/resource-manager/Microsoft.AzureStack/stable/2017-06-01/Registration.json b/specification/azurestack/resource-manager/Microsoft.AzureStack/stable/2017-06-01/Registration.json
index c2e067d946e9..98e9c47a4d91 100644
--- a/specification/azurestack/resource-manager/Microsoft.AzureStack/stable/2017-06-01/Registration.json
+++ b/specification/azurestack/resource-manager/Microsoft.AzureStack/stable/2017-06-01/Registration.json
@@ -57,6 +57,45 @@
         }
       }
     },
+    "/subscriptions/{subscriptionId}/providers/Microsoft.AzureStack/registrations": {
+      "get": {
+        "x-ms-examples": {
+          "Returns a list of all registrations under current subscription.": {
+            "$ref": "examples/Registration/ListBySubscription.json"
+          }
+        },
+        "tags": [
+          "Registrations"
+        ],
+        "description": "Returns a list of all registrations under current subscription.",
+        "operationId": "Registrations_ListBySubscription",
+        "parameters": [
+          {
+            "$ref": "AzureStack.json#/parameters/SubscriptionIdParameter"
+          },
+          {
+            "$ref": "AzureStack.json#/parameters/ApiVersionParameter"
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "OK",
+            "schema": {
+              "$ref": "#/definitions/RegistrationList"
+            }
+          },
+          "default": {
+            "description": "Error response describing why the operation failed.",
+            "schema": {
+              "$ref": "AzureStack.json#/definitions/ErrorResponse"
+            }
+          }
+        },
+        "x-ms-pageable": {
+          "nextLinkName": "nextLink"
+        }
+      }
+    },
     "/subscriptions/{subscriptionId}/resourceGroups/{resourceGroup}/providers/Microsoft.AzureStack/registrations/{registrationName}": {
       "get": {
         "x-ms-examples": {
diff --git a/specification/azurestack/resource-manager/Microsoft.AzureStack/stable/2017-06-01/examples/Registration/ListBySubscription.json b/specification/azurestack/resource-manager/Microsoft.AzureStack/stable/2017-06-01/examples/Registration/ListBySubscription.json
new file mode 100644
index 000000000000..3931cc0f0b72
--- /dev/null
+++ b/specification/azurestack/resource-manager/Microsoft.AzureStack/stable/2017-06-01/examples/Registration/ListBySubscription.json
@@ -0,0 +1,25 @@
+{
+  "parameters": {
+    "subscriptionId": "dd8597b4-8739-4467-8b10-f8679f62bfbf",
+    "api-version": "2017-06-01"
+  },
+  "responses": {
+    "200": {
+      "body": {
+        "value": [
+          {
+            "id": "/subscriptions/dd8597b4-8739-4467-8b10-f8679f62bfbf/resourceGroups/azurestack/providers/Microsoft.AzureStack/registrations/testregistration",
+            "name": "testregistration",
+            "type": "Microsoft.AzureStack/registrations",
+            "location": "global",
+            "etag": "0d00527e-0000-0000-0000-5a81ebdf0000",
+            "properties": {
+              "objectId": "9e9704ab-561a-4498-ac60-64b2314456ee",
+              "billingModel": "Development"
+            }
+          }
+        ]
+      }
+    }
+  }
+}