diff --git a/pkg/rings/rings.go b/pkg/rings/rings.go
index 3c6de21..9626120 100644
--- a/pkg/rings/rings.go
+++ b/pkg/rings/rings.go
@@ -16,10 +16,10 @@ const (
 	// ZoneMax indicates the highest number that can be used for a [ZoneID].
 	ZoneMax = (1 << 4) - 1
 	// NodeMax indicates the highest number that can be used for a [NodeID].
-	NodeMax = (1 << 12) - 1
+	NodeMax = (1 << 12) - 2
 	// NodeZeroMax indicates the highest number that can be used for a [NodeID]
 	// when its a gateway connected to Ring 0 (backbone).
-	NodeZeroMax = (1 << 8) - 1
+	NodeZeroMax = (1 << 8) - 2
 
 	// RingZeroBits indicates the size of the prefix on the ring 0 (backbone) network.
 	RingZeroBits = 16