diff --git a/netbox/ipam/validators.py b/netbox/ipam/validators.py
index 6669b7ec5..e2e33a1eb 100644
--- a/netbox/ipam/validators.py
+++ b/netbox/ipam/validators.py
@@ -2,7 +2,7 @@ from django.core.validators import RegexValidator
 
 
 DNSValidator = RegexValidator(
-    regex='^[0-9A-Za-z.-]+$',
+    regex='^(([a-zA-Z]|[a-zA-Z][a-zA-Z0-9\-]*[a-zA-Z0-9])\.)*([A-Za-z]|[A-Za-z][A-Za-z0-9\-]*[A-Za-z0-9])$',
     message='Only alphanumeric characters, hyphens, and periods are allowed in DNS names',
     code='invalid'
 )