diff --git a/dialpad/resources/number.py b/dialpad/resources/number.py
index 1f7bde4..695cbff 100644
--- a/dialpad/resources/number.py
+++ b/dialpad/resources/number.py
@@ -68,3 +68,19 @@ def assign(self, number, target_id, target_type, primary=True):
         'target_type': target_type,
         'primary': primary
     })
+
+  def format(self, number, country_code=None):
+    """Converts local number to E.164 or E.164 to local format.
+
+    Args:
+      number (str, required): The phone number in local or E.164 format.
+      country_code (str, optional): Country code in ISO 3166-1 alpha-2 format such as "US".
+                                    Required when sending a local formatted phone number.
+
+    See Also:
+      https://developers.dialpad.com/reference#formatapi_formatnumber
+    """
+    return self.request(['format'], method='POST', data={
+        'number': number,
+        'country_code': country_code
+    })
diff --git a/test/test_resource_sanity.py b/test/test_resource_sanity.py
index e7b3f9f..7489d31 100644
--- a/test/test_resource_sanity.py
+++ b/test/test_resource_sanity.py
@@ -266,6 +266,10 @@ class TestResourceSanity:
         'target_id': '123',
         'target_type': 'office',
       },
+      'format': {
+        'country_code': 'gb',
+        'number': '020 3048 4377',
+      },
     },
     'OfficeResource': {
       'list': {},