diff --git a/instagrapi/mixins/media.py b/instagrapi/mixins/media.py
index 9b3c7192..dc4cbe9b 100644
--- a/instagrapi/mixins/media.py
+++ b/instagrapi/mixins/media.py
@@ -123,7 +123,7 @@ def media_pk_from_code(self, code: str) -> str:
         B-fKL9qpeab -> 2278584739065882267
         CCQQsCXjOaBfS3I2PpqsNkxElV9DXj61vzo5xs0 -> 2346448800803776129
         """
-        return InstagramIdCodec.decode(code[:11])
+        return InstagramIdCodec.decode(code)
 
     def media_pk_from_url(self, url: str) -> str:
         """
diff --git a/instagrapi/utils.py b/instagrapi/utils.py
index c4834108..f62dcd67 100644
--- a/instagrapi/utils.py
+++ b/instagrapi/utils.py
@@ -7,6 +7,7 @@
 import urllib
 
 
+# $$("meta[property^='al:ios:url']")[0].getAttribute("content").split("media?id=")[1]
 class InstagramIdCodec:
     ENCODING_CHARS = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_"
 
@@ -26,8 +27,9 @@ def encode(num, alphabet=ENCODING_CHARS):
         return "".join(arr)
 
     @staticmethod
-    def decode(shortcode, alphabet=ENCODING_CHARS):
-        """Covert a shortcode to a numeric value."""
+    def decode(code, alphabet=ENCODING_CHARS):
+        """Covert a code to a numeric value."""
+        shortcode = code[:11] if code[0] != "-" and code[0] != "_" else code[:10]
         base = len(alphabet)
         strlen = len(shortcode)
         num = 0