diff --git a/instructions.md b/instructions.md
index dbbc50859..3485cff5e 100644
--- a/instructions.md
+++ b/instructions.md
@@ -99,6 +99,21 @@ Type B: Use "[Is MITM?](https://searxes.eu.org/collab/sxes/tool_ismitm.php)" web
 
 ![](image/siteground.jpg) <= This is how Siteground-hosted sites often appear to Tor visitors when timeouts/tarpitting doesn't occur.  If you see this please update `list_siteground.txt`.
 
+```
+list_othercdn_domain.txt
+
+
+{domain} {CDN code}
+
+{CDN code}:
+'amazon.txt':'Z1'
+'akamai.txt':'Z2'
+'imperva.txt':'Z4'
+'google.txt':'Z5'
+'microsoft.txt':'Z6'
+'inap.txt':'Z7'
+```
+
 ```
 IMPORTANT: Please add only "FQDN" or "FQDN[space](comment here)"