diff --git a/changelogs/fragments/7219-fix-nsupdate-cname.yaml b/changelogs/fragments/7219-fix-nsupdate-cname.yaml
new file mode 100644
index 00000000000..bd58eb883fb
--- /dev/null
+++ b/changelogs/fragments/7219-fix-nsupdate-cname.yaml
@@ -0,0 +1,2 @@
+bugfixes:
+  - nsupdate - fix a possible ``list index out of range`` exception (https://github.com/ansible-collections/community.general/issues/836).
diff --git a/plugins/modules/nsupdate.py b/plugins/modules/nsupdate.py
index ac3c695cf23..0d8c1ea1035 100644
--- a/plugins/modules/nsupdate.py
+++ b/plugins/modules/nsupdate.py
@@ -467,10 +467,8 @@ def ttl_changed(self):
         if lookup.rcode() != dns.rcode.NOERROR:
             self.module.fail_json(msg='Failed to lookup TTL of existing matching record.')
 
-        if self.module.params['type'] == 'NS':
-            current_ttl = lookup.answer[0].ttl if lookup.answer else lookup.authority[0].ttl
-        else:
-            current_ttl = lookup.answer[0].ttl
+        current_ttl = lookup.answer[0].ttl if lookup.answer else lookup.authority[0].ttl
+
         return current_ttl != self.module.params['ttl']